guys, I'm a little short on cash right now but I really want to upgrade my receiver, a yamaha 5740. A friend has offered to give me $140 for my 5740 and if I put a $100 to that I can get a refurb onkyo 602. I was thinking about getting one of the 602's for a while, but I dont know if It will be a big improvement or should I just wait and save. these are the receivers that I really have been looking at,yamaha rx-v757, rx-v1500, hk335 or 430/630 refurb from ebay and the pioneer 1015. Only problem is that I wont be able to get the money for one of these for a while, I spent enough for now, any input on which one to buy would be great, I have klipsch sf-3, fronts, sf-1 rears and def tech c1 center, m&k v-1b sub.