what would you get for this?

[Oni]

The situation is:
Im selling old PC... need new one... have £500-600 to spend purly on what goes inside the PC. (total budget of £1,100 on a new PC, but have already chosen a monitor and keyboard etc.)

The shuttle I chose:
Biostar IDEQ 200A Barebones System (FS-000-BS) (overclockersuk site)
- Supports Socket 478 processors upto 800FSB
- ATI RS300 and ATI IXP150 Chipsets
- Dual-Channel DDR400 Support
- Onboard ATI Radeon 9100 Graphics
- 1 x AGP 8x and 1 x PCI slots
- 4 x USB 2.0 Ports
- 2 x IEEE1394 Firewire Ports
- Serial ATA with RAID 0,1 support
- 6 Channel Audio
- 10/100 LAN
- Dimensions: 210mm x 323mm x 187mm (W x D x H)

could someone help me with what to buy to make this a system for games and photoshop work please?? (I wont need a floppy drive.)
(links to specific parts and prices would be greatly appreciated)
Regards,
Matt

[Defiant]

1x P4 3.0Ghz 800mhz CPU (Around £140)
2x 512mb Cruical PC3200 DDR (Around £120)
1x Samsung Spinpoint P60 160GB Sata HD (Around £90)
1x Saphire Radeon 9800Pro 128mb (Around £135)
1x NEC 2505 Duel layer DVD writer (Around £65)
1x Mitsumi FA402M 1.44 FDD+Int Combo 7 in 1 Card Reader (Around £17)
1x

CPU£140
Mem£120
HD£90
GFX£135
DVD£65
FDD/CARD£17

Total=£567