Thanks for the info re: video cards!

Also, Freddie, thanks a bunch for your input. I think you make some very good distinctions in your post. Especially helpful was you pointing out the motherboard difference, as i'd have never have figured that one out. I'll admit that does give me a little pause, but I generally use my computers for 2-5 years before even thinking of upgrading them, so i'm still considering my options.

Thank you all for your input! I can see, just in the few days i've been reading these boards, that i've joined an incredibly helpful community!