Thanks everybody for the useful replies, which I have read carefully and looked up the recommendations.
Firstly, I don't really want to go down the road of esoteric, valve, or vintage amps. Also, some of the options mentioned will not give me the lively presentation (a la Supernait-2) that I am looking for (eg Accuphase).
The X-tone or Loki tone control units might be interesting, but there is no Tape Loop on a Naim Supernait-2. I know I could fit a tone controller between CD player and amp, but that would not facilitate tone control on my other amp inputs (tuner, DVD player, TV receiver etc).
So I think my revised question is this:
Of the following modern integrated amps with tone controls, which will give me a lively sound presentation, similar to Naim Supernait-2?
- Rotel RA-1572 (or RA-1592)
- Creek Evolution 100A
- Yamaha A-S1100 (or A-S2100)
- Nad C375BEE
- Cambridge Audio Azur 851A*
*this is a model I have just stumbled across, with tone controls
I know I should ideally demo my shortlisted amps, but I live in an area with few hifi shops and it is hard to find the models I am interested in for A/B comparisons with my own CD player and speakers!