I second the vote for an LS35a speaker/tube system. Or a great amplifier though solid state was the Audio Research D 52 B I saw one on Audiogon for under $500. This makes a very musical system. You could pick up a ARC SP-6B or SP-8 and have a very musical system. When I sold the stuff this was a heck of a system that you could listen to for hours. One could add a SACD player or turntable to this system and come in lots less than what your budget is probably.
Good listening,
Steve
Good listening,
Steve