Need Help Upgrading Graphics Card

[Donavaughn_08]

System Specs:
Dell Vostro 220s
Windows 7 Ultimate
CPU: Intel Dual Core E5300 2.60ghz
Memory: 3gb ddr2
HD: Westerm Digital 250gb
GPU: EVGA Geforce GT 430 1GB DDR3
PSU: Stock I believe between 250-300 watts
Monitor: Acer 21.5" Widescreen HD
Resolution: 1900 x 1200

I am looking to upgrade my graphics card because it has a lot of problems playing games at 1900 x 1200 resolution and crashes a lot. I play games like WoW, Rift, and the Total War franchise. I can play WoW at that resolution with everything on Medium settings and get about 30fps but RIft on low settings at that resolution I only get about 10-20 I understand that Rift is more GPU intensive. Because I have a slim case I am restricted in getting a card so I was wondering what would be the best card to get to play WoW at 1900 x 1200 at high settings with good FPS. I am looking for a card that would play those 3 games great without upgrading the case. I could possibly upgrade the PSU but not wanting too unless I have too. I have two cards I am currently looking at here is the links.

SAPPHIRE 100293L Radeon HD 5570 1GB 128-bit DDR3 PCI Express 2.1 x16 HDCP Ready Low Profile Ready Video Card
http://www.newegg.com/Product/Product.aspx?Item=N82E16814102874

XFX HD-567X-ZNL3 Radeon HD 5670 1GB 128-bit DDR3 PCI Express 2.1 x16 HDCP Ready Video Card
http://www.newegg.com/Product/Product.aspx?Item=N82E16814150535

I understand the second card is bigger and was wondering if I could put a big card like that in my current case?

 

[jyjjy]

The build I initially suggested was $579. With the suggestions I made in the post after to cut the price down it comes out to $502 shipped. The CPU isn't a quad core but there's an 85-90% chance that it will be one and if not it's still superior to an Athlon II x4 which is what you would be looking at otherwise.

 

[Donavaughn_08]

Best answer selected by Donavaughn_08.

 

[Mousemonkey]

This topic has been closed by Mousemonkey