No although blunt his response was correct. How many different ways do we have to put this, how many different times do we have to say this? You either say PCX or PCI-E. PCI-X is a server standard.
Also there are about 458234903408 different threads about this exact same topic. Use the search function.
I do not mind replying and helping people out, in fact i enjoy it, otherwise i wouldn't have as many posts as i do, but please, help us out in turn and use a search.
EVGA is excellent, their step up program is very useful. Additionally the best manf are probably Asus, MSI, Leadtek, and (if you can find them) Gainward. Those manf dont simply stray from reference design they generally use higher quality memory, different layout etc... EVGA i would put on mid range, but their CS is excellent as well as some of the services they offer.
You really cant go wrong, but i would stay away from XFX and PNY, not that they are really bad, but they dont have the best track record for video cards.
-Kevin