I'm not sure whether the budget is just for the base unit or for peripherals too so here's a couple of specs.
Just the desktop:
Case
COOLERMASTER SILENCIO 550 QUIET MID TOWER CASE Processor (CPU)
Intel® Core™i5 Quad Core Processor i5-3570 (3.4GHz) 6MB Cache Motherboard
ASUS® P8Z77-V LK: PCI-E 3.0 READY, SLI, CROSSFIREX Memory (RAM)
8GB SAMSUNG DUAL-DDR3 1600MHz (2 X 4GB) Graphics Card
2GB NVIDIA GEFORCE GTX 660 - 2 x DVI, HDMI, - 3D Vision Ready Memory - 1st Hard Disk
120GB KINGSTON HYPERX 3K SSD, SATA 6 Gb/s (upto 555MB/sR | 510MB/sW) 2nd Hard Disk
1TB 3.5" SATA-III 6GB/s HDD 7200RPM 32MB CACHE 1st DVD/BLU-RAY Drive
24x DUAL LAYER DVD WRITER ±R/±RW/RAM Power Supply
CORSAIR 650W ENTHUSIAST SERIES™ TX650 V2-80 PLUS® BRONZE (£79) Processor Cooling
Super Quiet 22dBA Triple Copper Heatpipe Intel CPU Cooler (£19) Sound Card
Creative Sound Blaster® X-Fi™ Xtreme Audio (£32) Network Facilities
10/100/1000 GIGABIT LAN PORT - AS STANDARD ON ALL PCs USB Options
MIN. 2 x USB 3.0 & 4 x USB 2.0 PORTS @ BACK PANEL + MIN. 2 FRONT PORTS Operating System
Genuine Windows 7 Home Premium 64 Bit w/SP1 - inc DVD & Licence (£79) Office Software
NO OFFICE SOFTWARE Anti-Virus
NO ANTI-VIRUS SOFTWARE Warranty
3 Year Silver Warranty (1 Year Collect & Return, 1 Year Parts, 3 Year Labour) (£5) Delivery
STANDARD INSURED DELIVERY TO UK MAINLAND (MON-FRI) Build Time
Standard Build - Approximately 9 to 11 working days Quantity
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Which leaves enough of the budget for an upgrade to a Blu-Ray drive if required at all. The PSU could be dropped down to 450W if there are no plans to upgrade in future.
Or with the peripherals:
Case
COOLERMASTER SILENCIO 550 QUIET MID TOWER CASE Processor (CPU)
AMD FX-4350 Quad Core CPU (4.3/4.2GHZ - 4MB CACHE/AM3+) Motherboard
ASUS® M5A97 R2.0(DDR3, USB3.0, 6Gb/s, Windows 8 Ready!) Memory (RAM)
8GB SAMSUNG DUAL-DDR3 1600MHz (2 X 4GB) Graphics Card
2GB NVIDIA GEFORCE GTX 660 - 2 x DVI, HDMI, - 3D Vision Ready Memory - 1st Hard Disk
120GB KINGSTON HYPERX 3K SSD, SATA 6 Gb/s (upto 555MB/sR | 510MB/sW) 2nd Hard Disk
1TB 3.5" SATA-III 6GB/s HDD 7200RPM 32MB CACHE 1st DVD/BLU-RAY Drive
24x DUAL LAYER DVD WRITER ±R/±RW/RAM Power Supply
450W Quiet 80 PLUS Dual Rail PSU + 120mm Case Fan Processor Cooling
STANDARD AMD CPU COOLER Sound Card
Creative Sound Blaster® X-Fi™ Xtreme Audio (£32) Network Facilities
10/100/1000 GIGABIT LAN PORT - AS STANDARD ON ALL PCs USB Options
MIN. 2 x USB 3.0 & 4 x USB 2.0 PORTS @ BACK PANEL + MIN. 2 FRONT PORTS Operating System
Genuine Windows 7 Home Premium 64 Bit w/SP1 - inc DVD & Licence (£79) Office Software
NO OFFICE SOFTWARE Anti-Virus
NO ANTI-VIRUS SOFTWARE Warranty
3 Year Silver Warranty (1 Year Collect & Return, 1 Year Parts, 3 Year Labour) (£5) Delivery
STANDARD INSURED DELIVERY TO UK MAINLAND (MON-FRI) Build Time
Standard Build - Approximately 9 to 11 working days Quantity
1