You’ll love the 606s for sure, but they will need a while to run in. I’d give them at least a couple of months before upgrading the amps. SN3 can drive them (I’ve tried it as I have one), but they really love the NAP 300.
You can get a lot out of the speakers using passive amps, but it sounds like you need to scratch the active itch so good luck finding your snaxo!
I have a free shelf now the NS01 has gone.
I heard this active set up at the Bristol show too. Although it may have been with the Titan 505s rather than the 606s. I thought it was among the best if not the best sounding system there.
Enjoy!
I got a Kudos SNAXO from Cymbiosis about 9 months ago as they had NOS available. Not sure if they have any left but worth a phone call.
I have a vague recollection that @Cymbiosis might have bought up Naim’s remaining stock of SNAXOs. Not 100% certain of that, but if I’m right they are likely the only chance of getting hold of one.
Yeah - they did I believe
Yes, I did, along with other very desirable items like Hi-Caps and Supercaps.
All sold out now, but quite recently we did have a secondhand 242 that came in trade in so there’s always a chance we may see more examples of this fantastic crossover 
Best regards, Peter
I hope I don’t regret this, I have just received a message for a brand new unopened SNAXO 242 (T606) and turned it down, having listened to the comments here recommending to upgrade source and amplifier before going active.
I think that’s probably the right decision. Active systems are notorious for exposing the weakness of the source so it’s the right priority. Obviously that depends on whether you can find another SNAXO, but if you’re patient I’m sure one will turn up.
Having heard a Kudos demo using the Exposure crossover, it did sound very good, so I’m sure that would be a viable option too if you can’t find a SNAXO.
You could always buy it and do your original plan, in the knowledge that you’ll need to invest further in order to optimise things. I guess it depends on how many of these Snaxos are kicking around, and how much you are willing to spend in future.
Not got the dosh for the new speakers, upgrade and the SNAXO.
The SNAXO 242 seems to be as ‘rare as hen’s teeth’ so, depending on the price, I would have secured it if I was in your position. There are none listed, at least in UK and Europe, on a well known web-crawler listings site that locates online listings on eBay, audiomarkt, and forums.
There a couple of s/h Exposure VXN’s out there for around £1,900.
Do you already have the 606 yet. If not - there is plenty of time to enjoy the 606 now and upgrade later when they are run in.
606s are really nice. But be careful - they show you everything (all you are doing with your system), as top speakers do. And that is good!
606’s due shortly. Running Linn Majik 140s currently.