I just bought a whole new system - an Onkyo 9010 amp, KEF Q100 speakers and a Klipsch R-12SW sub. However, come to find out the Onkyo and the sub are completely incompatible. The amp does not have a dedicated subwoofer output or pre-outputs. I had read that you could still use a sub with these systems by running speaker wire to their speaker-level inputs, and then running the speakers from the sub. This does not work with these either as the subwoofer only has two RCA inputs. So, long story short, I'm stuck with the sub because it was an open-box deal. I can, however, return the amp... I'm a bit bummed because I was digging the 9010. So after that long introduction, what are some other integrated amps to take a look at for less than $500? I'm open to used and/or refurbished units as well, as long as it's under $500... ideally under $400 also but I'm trying not to be picky. And as you could guess, one of the things I'm looking for is either a dedicated sub output or preout connections. I have been eyeing the Yamaha A-S501 and Onkyo 9150... the Marantz 6005 was on that short list too until I learned that it also does not have a sub out or preout connections. Does anyone have any firsthand experience with the 9150 when compared to the 9010? As I mentioned, I'm definitely a fan of the 9010 but I've heard the 9150 actually seems to sound worse than the 9010 for some reason. I know it's all subjective but I'm just trying to make the right decision this time, and unfortunately I live over an hour from the closest audio shop so test driving isn't really an option.