In my experience, the early RG550 couldn't be faulted, mine was built flawlessly. I've never seen a bad one, come to think of it. So based on this, I'd say the original 550 was probably "Prestige-worthy", but maybe in an RG1570 kind of way, being more stripped down and featuring lower quality pickups but still being built well. However, I think the RG750 and 770 were more like the luxury versions of the 550 and 570. The 750 is another guitar I own and I am still playing 17 years later, but it's quite battered. Poor thing. The neck still feels amazing, though.