I used mine with a Denon PMA-2500NE, which was a great match. Before that I used a Rega Cursa/Maia3 with them which was OK but lacking a bit of control at higher SPLs. Thats really nit-picking though as I could have happily lived with the Rega Pre/Power to be honest.
The 201/2s are certainly the 'Best' hifi speakers I have owned in terms of low distortion, soundstage & Dispersion and just generally balanced presentation.