Are these good deals?

Which of these would you buy in each price bracket? [$1200-$1600] [$700-$1000] [400-650]
And which one would you say has the best price to performance ratio out of all of these builds?

$1539.99
NZXT Crafted Series Phantom Black/Green Steel
Corsair Enthusiast Series TX850
Asus P8Z77-V LK Motherboard
Intel Core i7 3770(non-K)
G.SKILL Ripjaws X Series 16GB
EVGA GeForce GTX780 SuperClocked 3GB
Samsung Electronics 840 EVO-Series 500GB SSD (OS) Windows 8.1 PRO
Seagate Desktop HDD 4 TB (DATA)
DVD BURNER

$1299.99
NZXT Guardian 921 RB 921RB-001-RD
Corsair Enthusiast Series TX850
ASRock Fatal1ty 990FX Killer
AMD FX 8320 Factory overclocked to 4.3GHz
Crucial Ballistix Sport 16GB
XFX AMD R9 290 Graphics Card 4GB
Samsung Electronics 840 EVO-Series 500GB SSD (OS) Windows 8.1 PRO
Seagate Desktop HDD 4 TB (DATA)
DVD BURNER
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$939.99
NZXT Source 530 CA-SO530-M1
CORSAIR Enthusiast Series TX650
MSI ATX Motherboard P67A-GD65 (B3)
Intel Core i5-2500(non-k) CPU
G.SKILL Ripjaws X Series 8GB 1600MHz
EVGA GeForce GTX 680 Classified 4 GB DDR5
WD Black 500 GB Desktop Hard Drive (OS) Windows 7 PRO
WD AV-GP 750GB MPN: WD7500AVVS (DATA)
DVD Burner

$739.99
NZXT GAMMA Classic Series GAMA-001BK
CORSAIR Enthusiast Series TX750
ASRock 880G Pro3
AMD FX 8120 CPU factory overclocked to 4.3GHz
G.Skill Value RAM 8GB 1333MHz
Zotac GTX 770 2GB
PNY (SSD9SC120GMDF-RB) 120GB SSD (OS) Windows 7 PRO
WD Green 2TB - WD20EZRX (DATA)
DVD Burner
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$639.99
RAIDMAX Viper ATX-321WR Red Steel
Corsair Enthusiast Series TX650
ASUS P7H55-M/CSM Motherboard
Core i5-760 Quad-Core CPU
G.Skill Value RAM 8GB 1333MHz
ZOTAC AMP! ZT-70402-10P GeForce GTX 760 2GB
Western Digital 1 TB Black, WD1003FZEX(OS) Windows 7 PRO
DVD Burner

$499.99
NZXT Source 210 S210-002 White w/Black Front Trim
Corsair Enthusiast Series TX650
ASUS M5A78L-M LX PLUS Motherboard
AMD FX 6300 CPU Factory overclocked to 4.3GHz
G.Skill Value RAM 8GB 1333MHz
ZOTAC Synergy Edition ZT-60904-10M GeForce GTX 660 2GB
Western Digital 1 TB Black, WD1003FZEX(OS) Windows 7 PRO
DVD Burner
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