Best you are going to do in your price range is a Nvidia 750ti. It draws only about 60w (which means you won't need to replace your power supply) and it is miles beyond the gt 640 performance wise (especially since the 640 is not meant to be a gaming card) and I'm also assuming you are located in the USandA, cheers.
Video Card:Asus GeForce GTX 750 Ti 2GB Video Card ($159.99 @ NCIX US) Total: $159.99 (Prices include shipping, taxes, and discounts when available.) (Generated by PCPartPicker 2014-03-20 16:59 EDT-0400)
I guess I might get the gtx 750 ti then. On paper it does seem like a solid card, and it will work for duel-monitor setup. Just can't find any reviews on the card as to how it will function with WoW and maybe some of the other games I listed.
Some people in my guild told me to avoid getting anything that new/anything that is low 700s. But looks like the best bang for my buck.
If anyone else has any input I'd sure like to hear it! Ty
I wouldn't really rely on your guild mates if they are telling you this card isn't good, it's pretty much the go to bang for your buck budget card. However don't expect to be getting 100fps in wow as it really is a CPU limited game, but it will definitely be a noticeable upgrade.
I noticed that the asus model has the 6pin req, so I guess that means it's probably the better choice here. Only question I really have left is my psu good enough for it? And is the 6pin 12V 36A connector good!