Hey gang, I just picked up an SX-770 blackface for $100 at a local shop, complete with the manual. This thing spent it's whole life under a dust cover and it definitely shows (pics to follow when I get a chance to pop the hood.) a quick demo shows that everything appears to be in proper working order but I haven't had a chance to give it a proper test drive. I can tell a few of the bulbs are burnt out behind the tuner display, but other than that, It seems fine. My question is, are there any common problems or pitfalls I should know about with this model? Is this a keeper, or should I flip it and get a higher end pioneer? (in partial to pioneer) thoughts?