I've got a 1991 RG550 in Laser Blue with stock everything, and it looks as good as it sounds—and it looks pretty damn awesome. I've also got a white 1987 RG550 with DiMarzio PAF and X2N pups, with a LoPro edge replacing its stock Edge. They're both great workhorses, and my 1987's also one of only two I've ever seen!
I purchased this 1987 rg550 from a friend of a friend, when i received it the pickups had already been swapped out with two seymour duncan invader pickups so this think was ready to shred to hell and back. Even though it's a basswood body it still had a very comfortable feeling weight to it, doesn't feel too light. The maple neck is still smooth even considering its almost 30 years old.