Rookie Computer Build, Suggetions?

[oneal]

Hey guys, so this is my first computer build. I'm not new to electronics or anything, this is just my first time building a computer. Any tips or critiques are greatly appreciated.

My goal is to have this computer last me for Atleast the next 15 years. I don't care about overclocking or crossfire. I just basically want to be able to play high end games such at LOL, Path of Exile, etc., with no problems. Budget is about $1150 (tax included.) I've compiled a list of parts and prices that I've found on new egg, and am confident with these choices, save the power supply; I think it needs work. Also, as far as an OS, I would -prefer- XP, but will settle for Win 7 or 8. I plan to use a solid state HD, though I haven't settled on the size. Heres the list:

Full Tower Case-
Thermaltake Chaser Series Chaser MK-I (VN300M1W2N) Black SECC ATX Full Tower Computer Case
http://www.newegg.com/Product/Product.as...6811133191
Price: $154.99

Motherboard-
MSI 990FXA-GD80 V2 AM3+ AMD 990FX + SB950 SATA 6Gb/s USB 3.0 ATX AMD
http://www.newegg.com/Product/Product.as...6813130649
Price: $164.99
Specs: http://us.msi.com/product/mb/990FXAGD80....o-overview

CPU-
AMD FX-6350 Vishera 6-Core 3.9GHz Socket AM3+ 125W Desktop Processor FD6350FRHKBOX
http://www.newegg.com/Product/Product.as...gnorebbr=1
Price: $124.99

Graphis Card-
SAPPHIRE TRI-X OC 100362-2SR Radeon R9 290 4GB 512-bit GDDR5 PCI Express 3.0 Video Card
http://www.newegg.com/Product/Product.as...gnorebbr=1
Price: $279.99

^Does MB have a powerpin connector for this? Or do I need a converter for the end of the plug?

RAM DDR 1333-
http://www.newegg.com/Product/Product.as...-_-Product
Price: $124.99
OR
http://www.newegg.com/Product/Product.as...-_-Product
Price: $248.99

Power Supply-
APEVIA ATX-AP800W 800W ATX12V / EPS12V SLI Ready CrossFire Ready Power Supply
http://www.newegg.com/Product/Product.as...gnorebbr=1
Price: $59.99 / was $99.99

Anything I left out, let me know.
Thanks in advance