Cheap and powerful pre/power combo $1k budget

Parasound P3 pre amp with Parasound A23 power amp might be just about what you are looking for. 125 wpc. So not as much power as you had asked for, but close.

This is a fantastic combo for just around 1000 dollars used.. Even has balanced inputs, and gain controls on the amplifier. It's from the halo line of parasound so all units have sweet looking blue lights as well.

Rotel RB-990BX 200w amp w/Rotel RC-995 Pre-amp. Around $800 used. Leaves enough for an excellent Interconnect. Lots of other fine choices as well. Good Luck!

Older Sunfire if you want a pre-amp and amp, tons of power. (Theater Grand I and Cinema Grand)

Sometimes you can find a Plinius integrated in your price range. 8100 is in your price range.