I've got a 17" HP ENVY with the 2670QM. I've got no complaints, I can play most of my games at decent resolution and medium to high details which isn't bad for a notebook.
What kind of price difference are you looking at between the two? I think that would pretty much cinch it for me. If the 2670QM is significantly more expensive (maybe $100+) then I'd tuck that money away for a new laptop in a couple years time rather than waste the money on a marginal performance increase when you'll be GPU limited anyways.