I would strongly suggest the Adcom 750. There is nothing below $3k US that will touch it. It offers both passive and active operation, is a Nelson Pass design, and offers both true balanced and s/e operation. There are several for sale for $750 US here on A'gon. There are also simple mods that will make the active option untouchable. Pocket the difference and get some new cables!
Help me with preamp choice.
I am breaking up my large hometheater system. I am just about done with a new room I have added on to my home.I have not had a stand alone two channel system in years.I like all kinds of music. The only equipment I will be takeing to the new room will be my amp,cd player and my main speakers. ( krell ksa 250, sony xa777 and vmps supertower R's ) My cables are harmonic tech interconnects and acustic zen on the speakers. My new room is 27 feet wide 25 feet deep with 10 foot height. I would like to buy used around $1500. Any type of preamp would be considered as long as you thought it would mate well with my amp.