How much are you looking to spend? I just switched to separates and I am about to list my Denon 3805 in the hardware for sale area for $ 525.00 plus shipping. However, I am open to offers. I bought it new at Tweeter in 2005 and I have the calibration mic also. It's in perfect condition and has been in a no kids, no pets, no smoking house.
I'd love to do that, but the speakers are really cheap, and I'm using them in the upstairs tv room, rather than in the theatre downstairs. So it'd be hard for me to justify that kind of money, unfortunately.
I believe the Harman Kardon is going to be your best bet. In looking at the older H/K models it appears the series beginning with 2 has the pre-outs so perhaps if the models older than 240 (like 235 or 230?) are available somewhere you might be able to get those even cheaper.