Final Build Advice

My goal is run Final Fantasy XIV on my HDTV with an avg framerate around 30 fps or better. The requirements for this game have been compared to Crysis so I stretched to fit in a 5850. My budget is a FIRM $800 and I need a complete tower with wireless keyboard/mouse and an OS. Here goes:

CPU Athlon II x4 640 3.0 GHz
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

GPU XFX Radeon HD 5850
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

PSU OCZ ModXStream Pro OCZ700MXSP 700W
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

HD Western Digital Caviar Blue WD5000AAKS 500GB 7200 RPM
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

RAM OCZ Special Ops Edition 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

MOBO ASRock 870 EXTREME3 AM3
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

CASE Rosewill DESTROYER Black Gaming ATX Mid Tower Computer Case
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

DVD ASUS DRW-24B1ST/BLK/B/AS Black SATA 24X DVD Burner
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

OS Microsoft Windows 7 Home Premium 64-bit
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Keyboard/mouse http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Total Cost: 799.90 + 15.00 shipping - 60.00 rebates = 754.90!!!

Can I do any better with my budget? Will my CPU bottleneck the system? Will everything fit in the case? Are there any brands used that are unreliable? Would it be safe to overclock some components? Are there any incompatibilities? Any suggestions for improvement while preserving the budget are welcome.

Thanks in advance,


Opti