The NDX 2 works in a similar way to the original ND5 but the big draw back is the cost and the imbalance this would introduce to the current system (which includes a Nap200 and Nac 202) the Naim upgrade path can be a slippery slope to financial extravagance!
I wouldn’t call that unbalanced at all. NDX2/202/200 would be a nice system. Yes, it’s quite an expensive box, and an ND5XS2 would be OK if you don’t want to spend £5k, but the NDX2 wouldn’t be wasted in that system.
Thanks everyone for your comments and advice. By way of update, I gave up on the nd5 xs2 and upgraded to the ndx 2-( robbing the piggy bank!) It sounds really excellent with my set up so I am very happy. It also has a decent remote which provides the functionality I seek.
For those interested in this sort of detail I have a NAC 202/ nap 200, and the speakers are heco direckt. These are cool looking and sounded so much better than others (Keffs b&w etc) in our audition session a couple of years ago.