Typically, they're sending back PS3 Slims now... I don't think there's any way they'd send you a new original 60GB PS3 and if you choose to ask them to fix it, they try to convince you that they'll send you a fixed different one and all sorts of crap like that. Plus, if they try to fix it, I really have a feeling that'd be temporary just like when I do it - not very long term. It'll also take too long probably.
As I linked to earlier, I personally got the original 60GB in an almost new condition for around $126.
I wouldn't. That was just an example of an 80GB that I thought would work. Plus, like I already said, Sony didn't offer me that (that wasn't one of the options) and any chance at that is gone now that I've opened my PS3 before.