I’d do the 282 first as that’s what I did!
I had an NDX (original model) and a 202/NapSC/Hicap/200 and I was staggered at the improvement that the 282 brought to the system.
Given that the original NDX was sufficient to shine through I don’t see why the NDX2 should be more so.
I then moved to a 250DR (with a change to Hicap DR somewhere too) and then went back to the source.
I think I may have left the source upgrade a little late, but the 250DR came up at 25% discount for a mint model that had been used at a Hifi show for 1 weekend so I grabbed the opportunity.