A BEST 3 and A COMPLETE 2 would almost be identical anyway, aside from a few album only tracks that would probably appear on A BEST 3...
I just hope for 15th anniversary versions. I'm think I'm dreaming though, so I'm not going to get my hopes up. :O
I believe it will be some form of compilation though...
Random note: I reckon if A BEST 3 is released, You & Me will be on it.