Hi looking for a custom built Gaming rig for around £1000(No monitor). Came up these these two... any advice on which is best or anything that needs changing or can you find better!

System 1
APEVIA X-Cruiser Mid-Tower Metal Case w/ Side Window
(Quad-Core)Intel® Core™ i7 920 @ 2.66GHz 8 MB cache LGA1366
625 Watts Power Supplies (Enermax Pro 82+ 625Watt Power Supply (84 - 88% Efficiency))
THERMALTAKE V1 CPU COOLER
Gigabyte GA-EX58-UD3R X58 2 Way Crossfire/SLI DDR3
6GB (3x2GB) PC10666 DDR3/1333mhz Triple Channel Memory (G.SKILL NQ Series w/Heat Spreader
ATI Radeon HD 4890 PCI-E x16 1GB DDR5 Video Card
Single Hard Drive (1TB SATA-II 3.0Gb/s 16M Cache 7200RPM Hard Drive)
LG 22X DVD±R/±RW + CD-R/RW DRIVE DUAL LAYER


System 2
Antec 900 Case
Intel Core i7 920 2.66Ghz D0 Overclocked to 3.40GHz!
Gigabyte EX58-UD3R Intel X58 (Socket 1366) PCI-Express DDR3 Motherboard
OCZ Gold 6GB (3x2GB) DDR3 PC3-12800C8 (1600MHz) Tri-Channel Kit
Corsair TX 650W ATX2.2 SLI Compliant PSU
Seagate Barracuda 7200.12 500GB SATA-II 32MB Cache
Akasa AK-967 Nero Direct Contact Heatpipe CPU Cooler
Arctic Silver 5 heatsink compound
ATI Radeon HD 4890 PCI-E x16 1GB DDR5 Video Card

Both just under £1000. Will be used for gaming and watching films.

Any advice on either one