I read something like Lacie, WD-Mybook and some others were causing the majority of the problem. Aside from those, are there others to avoid? An even better question is, what HDDs seem to be performing well with time machine? I am in the market for a HDD for this exclusive purpose. I could either assemble a HDD + a case, or buy a complete unit. Either is fine. I've been reading about it but info is a bit scattered. Opinions?