Proac D48R

I have heard the Sugden Masterclass IA-4 Integrated Amplifier with my Proac D-40r speakers (very similar to your D-48 speakers) and was very impressed with the results. It is in your price range new, with a minor discount, and is a real consideration if you are looking for an integrated amplifier. 33 wpc of pure class A listening pleasure.

that's interesting that you can get that speaker driving the way it can with only 33 watts.  I know it's only a measurement, however I ended up getting a larger Quick and AR amp as they just opened up big time with more current and higher power in general.  I have heard the D2 I believe it is, with a SET amp that was low watts and it was awesome.  The mids and highs just sang. I couldn't live with it as I need full sound, but there are some great amps out there now.

Does this mean that ProAcs and Solid State amplifier don't go well together?

Not at all milpai.....Pass as already mentioned and Plinius come to mind as does the Primare that Pete mentioned.  Some like Naim as well.  I used a Rega Elex-r with my Proac d20r with good success in a small room.  Keep us posted.  Regards.......

Thank You for the clarification carmenc.

And how would you describe the ProAc sound? In my room, with precise placement, my Quads's sound stage starts about 2-3 feet behind the speaker front face. And the sound stage is pretty wide, since I moved them 65" from the back wall and 36" from side walls, with 9 feet between the tweeters. If I change the speakers, I do not want to loose this character in the sound that Quads currently provides. I am looking for more refinement in treble and bass extension.