Best Amp and Preamp for $1000

I'm currently considering a used Rotel RB-991 (about $750) and a Rotel RC-980BX ($250). What do you recommend? I have seen and heard good reviews for both.
Rotel makes good entry level gear for the money. You did not mention what spkrs you are using. Later you might want to trade up on the pre,and keep the amp in case your spkrs are insensitive. Good listening.
Harman Kardon PA5800 ($300) Harman Kardon PT2500 ($150)