Integrated amplifier for Magneplanar SMGA

I have a pair of used SMGa Magneplanar which are in very good condition. I am looking for a used solid integrated amplifier that would go well with them. I would spend a maximum of 1000$ (less would be better). I only need 1 or 2 or 3 input sources (for cd player, HTPC, and aux), a power button and a volume knob. No need for treble, bass and balance adjustments. I say I could be very happy with a one source input if the quality and the price were advantageous and I wouldn't mind to plug and unplug the sources every time I need to change. The only thing I am looking for (cause I'm on a budget) is quality of the sound (and not how loud it can play) and a good bargain.
for your information if it helps: I mainly listen to classical music.
I'm currently borrowing a 50 watts per channel Rotel RA-840BX2. What do you think of it?
Any suggestions for an integrated amp that would sound great with these magneplanar?
Also, I would like recommendations for speaker cables that would sound great with SMGa.
thank you very much