I plan on upgrading my video card to something like a 6800gt but since I have only PCI slots, does that mean I won't be able to upgrade or is everything fine?
6800GT or anything about the 5500 or 5700 is PCI compatible but the 6800GT is PCI-e but not the standard PCI so you should go for 5500 or 5700 i got the AGP8x version of the 5500 oc very good card for the price
Not in the case of 6600GT....the PCI-E is like $180 and the AGP's I found were $230 or so =/
You definitely need to upgrade your motherboard. Not necessarily to the new motherboards with PCI-E because currently they don't offer a real performance gain. You'd still be good with an AGP based board for now