Hello all, I am looking to build a new gaming computer in the next 2 weeks or so and would like some opinions on the hardware I have selected and it's compatibility. I would also like to know which GPU is better out of the 2 I have been looking at. Thanks in advance!

Parts list:

Motherboard
-ASUS Sabertooth 990fx motherboard with UEFI BIOS
CPU
-AMD FX-8150 Zambezi 3.6ghz 8 core processor
Ram
-Corsair XSM3 8gb (4x2gb) 1600 SDRAM
GPU
-Sapphire Radeon HD7870 ghz edition OC 2gb
-Or-
-ASUS Radeon HD7870 ghz edition 2gb
SSD
-2x Corsair Force Series 3 60gb 2.5" SSD configured in RAID 0
HDD
-Western Digital Caviar Blue 7200 RPM 1tb HDD
PSU
-Cougar GX-1050 1050w PSU
CPU cooling
-Corsair H100 high performance CPU liquid cooler
Case
-Cooler Master CM Storm Trooper
Optical Drive
-ASUS 24x DVD burner

Also does anyone have any recommendations for a good gaming keyboard that's less than $100? Thanks again for looking!