Be interested to know how you get on. I have a 282 arriving in a couple of weeks and intend to use it with my 1 x HCDR for a while, but might look at other options in the future.
I will then probably have to upgrade the source from ND5XS2 before looking at the amp section again, so don’t think 252 will be on my list for a very long time.
Anyway, good luck and enjoy!
I have seen mention of matching before. Not sure how true this is… Perhaps @Richard.Dane might bestow some wisdom here…??
In my case, I have one CB-converted-to-Olive HC and one original Olive HC. Not perhaps ideal, but not so far apart, in years (1986 &1990 respectively). And - I believe sharing the original Naim transformer supplier/design…? (whose name eludes me…)
Yes, it’s desirable to aim for a close match due to the way the two Hicaps power the NAC282. Your two Hicaps should be close enough and most importantly both share the earlier Holden & Fisher transformer - after H&F closed, there were a small number in around '92 with St. Ives transformers, then Nuvotem.
Those Hicaps will be Holden and Fisher transformers. When two Hicaps are used there is a split of left/right which doesn’t happen with a single cap.
I have an 82 and had one hicap and then added a 2nd hicap. There was a significant uplift. Improved clarity and dynamics. The Supercap 2 took it to another level.
Would have been very happy sticking with 2 hicaps but pleased I made the jump to the Supercap 2.
If you are going for a 252 in the future then the Supercap is a no brainer!
Richard,
Thanks. I knew it was Fisher something…!! When I got the Olive HiCap, I had worked out the years and was fairly sure it was an H&F one - as my CB one was/is. Close enough will do me…!!
2nd HiCap is generally considered a worthwhile upgrade to the 282. 
There are several threads on this forum about 2x HiCap vs SuperCap. Absolutely no consensus. Do a search; read them and weep! 
Now, to your other point… You know you’ll eventually go for the 252… Get the SuperCap! 
I wouldn’t think about the 252 so miss the Supercap. I’d be looking at the 552 after the 282. If you have a 282 and looking at spending some money, the Supercap plus a 252 is not far off used 552 money and of course it comes with its own power supply.
There’s a big difference in price between a used 252 with Supercap and a 552. Looking at 10k minimum for a 552, more like 15k for a newish one. 252 used with Supercap around £6k.
My next step up tbf is a 552 ideally and I have the 82 plus Supercap 2. I would seriously consider going for the 252 as a big step up from what I have.
The 252 sounds terrific and is a very fine pre. Not to be dismissed. And of course if you have the Supercap already it means not loosing money on trading in.
I heard one with a Linn LP12 Klimax, NDX2, 555PS DR and 500DR. Sounded mighty fine.
Discussion of non Naim cables carrying power is not permitted on this forum.
Np 
As mentioned one you have two Hicaps there is then a channel split hence the need for a matched (or very close) pair.
Yes but the OP would be selling the 282 and a HicapDR.
If you prepared to spend £6k and moving on the 282 and power supply, you basically there!
Right, who’s lending me the cash please.
Form an orderly queue, here behind @Thedomestique and myself , please…
At least 2 metres apart though… 
Please also have evidence ready, of how many years you have owner Naim equipment. Minimum 10 years - no breaks allowed… 
Two hicaps on Nac 82 was a clear improvement for me. Both were serviced and were closely matched. Better clarity and bottom end. Used hicaps are readily available compared to used supercaps also.
Can I add a question? I took delivery of a NAC 282 and NAPSC plus a HiCap DR last week. It replaces an olive NAC 72 + HiCap. My plan was to sell on the 72 and HiCap but as a parting shot my dealer suggested I might use the olive HiCap instead of the NAPSC. Is this a good idea given the talk about balanced HiCaps earlier in this thread? I might add that the olive HiCap was serviced at the factory a year ago.
You can’t use a Hicap instead of a NAPSC, they are different PSUs and the 282 won’t work with the NAPSC.
As Guinnless points out the 282 needs the NAPSC to work. I’d stick with the single Hicap DR rather than dual them ( and you can’t officially DR the Olive Hicap)
How does the 282/HCDR/250DR compare to the 72/HC/250DR? As others have suggested, I would recommend to stick with one HCDR for your 282, especially when you have just received the 282 and HCDR last week. Perhaps get used to it for 1 to 2 years then consider adding a second Hicap if you feel the itch. Personally I wouldn’t bother adding a second Hicap as the 282/HCDR/250DR is very well balanced on its own. I tried 2 HC on the 282 and 1 HC sounds more balanced and better to my ears.
We should not forget that the 82/HC/250 or 282/HC/250 combo is pretty darn good, as it is - let alone adding a 2nd HiCap or a SuperCap.
Everything… is Relative… 
I can like my 82/250 with either one or two Hicaps… 