Hello,

I'm new to building computers - DIY and i was wondering if you guys can educate me a bit and tell me if my hardware parts are compatible to each other.
I've managed to put together two sets of rigs, all according to my budget (1500$).

First rig:
CPU:
AMD Phenom II x6 1090T Black Edition  =    $180
Motherboard:
ASUS Crosshair IV Extreme 890FX   =     $250
Power Supply:
CORSAIR AX1200 1200W, 80 PLUS Certified      =       $280
Memory:
CORSAIR XMS 4GB 240-Pin DDR3     =      $54
Graphics card (Only one card in this rig):
Gigabyte AMD Radeon HD 6990 (GV-R699D5-4GD-B) 4096MB PCIe x16 Gen 2.1 Eyefinity 6 Edition       =      On superbiiz.com -> $725 (no where in stock)
Storage:
Western Digital Caviar Black WD5002AALX 500GB 7200 RPM 32MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive -Bare Drive     =     $60
DVD:
ASUS 24X DVD Burner - Bulk 24X DVD+R 8X DVD+RW 12X DVD+R DL 24X DVD-R 6X DVD-RW 16X DVD-ROM 48X CD-R 32X CD-RW 48X CD-ROM Black SATA Model DRW-24B1ST/BLK/B/AS - OEM   =   $20

Total = 1569$


Second rig:
CPU:
AMD Phenom™ II X4 955  =  $113
Motherboard:
msi 890fxa-gd70)   =   $195
Power Supply:
Antec CP-1000 1000W, 80 PLUS Certified     =      $135
Memory:
G.SKILL Ripjaws Series 4GB 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800)       =       $41
Graphics card (two cards with crossfire):
2 MSI R6970 Lightning Radeon HD 6970 2GB     =       $387  X  2  =  $774
Storage:
Western Digital Caviar Black WD5002AALX 500GB 7200 RPM 32MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive -Bare Drive     =      $60
DVD:
ASUS 24X DVD Burner - Bulk 24X DVD+R 8X DVD+RW 12X DVD+R DL 24X DVD-R 6X DVD-RW 16X DVD-ROM 48X CD-R 32X CD-RW 48X CD-ROM Black SATA Model DRW-24B1ST/BLK/B/AS - OEM   =   $20

Total = 1378$

What do you think? which one of those rigs should i buy?
Do you i need to take other hardware? can you recommend me of an alternative?
1000W power supply is enough?

Any suggestions will be appreciated.
Thank you