Hi guys im new to this forum and new to wanting to build /upgrade PC's in general. now before i get annihilated with post of "this is in the wrong section!", let me start off by saying i looked for a better section to post these questions. this is the least offensive place to put this in my limited knowledge of this site.

NOW some help please :)

I have an iBuyPOWER PC from about 3 years ago. these are the specs
iBUYPOWER Gamer 904EL Core 2 Duo E6750 2.66GHz, with 2 gigs of DDR2 ram and an Nvidia GeForce 8500 GT GFX card.

i would really like to get my PC up to date for some of today's great PC games coming out soon or out now. MY Question: I would really like to know if it's possible for me to upgrade my PC enough with the rig i have now to achieve today's standard for a decent amount of cash OR would it be cheaper to buy a whole new rig that i can build?

Please help! thanks in advanced.