I have the classic MBP - I treated myself to it last April when I switched to Apple - it is an excellent machine and I'm very happy with it. Yes, the nVidia issue may yet surface, but that's what the warranty and Applecare (which I also bought) are there for. So, my recommendation would be the refurb classic MBP, great spec, very good power, impressive performance, that superb screen, individually tested and tried and Apple's warranty.
Cheers and good luck
Cheers and good luck