Advice needed Please, To Fix Or Not To Fix?

My AV receiver needs repairs totalling 317 bucks. This includes the 60 bucks diagnostic fee and tax. The repair man tells me it needs a new output board, multiple caps are leaking, and there is signal loss all over. He will also thoroughly clean it up inside. A complete referbish as he puts it. It's a Integra DTR 5.4 and I have had it for years. I always thought it sounded good. I have it paired with a combo of Energy and Yamaha speakers, sub is Energy too. What do you guys think? Worth fixing or should I get a new piece? I really miss not having 5.1 and want the sound back but I do not want to spend too much on a new piece. What would I have to spend new or used to at least match this piece? Thanks in advance to any one who responds.
P.S. The price quoted for repair sounds pretty fair, but I admit to not having too many things fixed so I don't really know.