If you are open to experimentation, you could try a pre-owned B&K ST140 @105 wpc. Another possibility is one of the older SA series hybrid amps by Counterpoint.
I drove an older pair of MGIIIs with an ST140 for several years, in a smallish room. As long as your volume demands aren't huge, it can do a very adequate job. Buying a used one will still leave lots left over in your budget for quality cables.
I drove an older pair of MGIIIs with an ST140 for several years, in a smallish room. As long as your volume demands aren't huge, it can do a very adequate job. Buying a used one will still leave lots left over in your budget for quality cables.