I think there is a PDF document on Adcom's web site about the 565 leak problem. It has photos that show the stains on the circuit board. You could look at those pics to know exactly what to look for when you pop the top off the 555.

There are a lot of good high current amps out there; starting with the Outlaw of course. Then there's Emotiva and a host of others. If you're looking for a two channel amp, I can personally recommend the McCormack. I've also read great thing about Odyssey.