wow, a thousand bucks is gonna let you buy amp power for whatever speakers you want.
my suggestion: anything with pre-outs plus external amp.
e.g. Yamaha RX-V659 or 661 or 663 + Behringer A500 (this amp is stable to 4 ohms, but doesn't have a 12v trigger) = im guessing this will not exceed 700 bucks.
or
Rotel RA-1062/RA-05 + RB1070 or RB1050 = depending on where you are should be around 1k
or
Outlaw Audio RR2150 stereo receiver + Behringer A500 = less than 900 bucks
or
Harman Kardon 3485 + Rotel RB1070 = less than 800 bucks
or any combination of the above.