£200 upgradE?

[Sandmaster500]

Hi, got about £200 "spare" to upgrade my rig or buy something nice, what are your thoughts?

Current:

3700 Sandy - Scythe ninja'd
BFG 7800GT OC
1gb Corsair XMS Pro
200gb spinny (another one coming soon)
Tagan 580W
Coolermaster Centurion 530
NEC dvd-rw
Sony DVD-rom

Peripherals:
Samsung SN-913N
Logitech MX510
Logitech internet keyboard
HI-FI and guitar amp for that extra boost

Use my PC for general brousing and music a lot, sometimes watching vids at the same time on it. Also use it to game whenever i feel like it.
So what do you think guys think? Worth upgrading anything or should i buy i nice MP3 or something?

Thanks

 

[Sandmaster500]

Thinking about it, i'm stuck between 3 decisions:

1. 20gb MP3 or a small one
2. Upgrade 2nd system from a 1.7 cellery and 640mb SDRAM to a 2nd hand 3000 ven and 512mb DDR RAM
3. Get another Samsung SN-913N for dual screenage or one for my 2nd system

 

[Sandmaster500]

Have been seriously thinking about the case idea and i am reallt torn. One one hand it would be great to have a case that matches the quality of the rest of my rig, on the other hand my current case does all the things i want it to and i think looks good so a new case might not do that much more.

Thinking:
Upgrade 3700 to a 3ghx otpy - £40
Upgrade 1gb XMS - giel one - £20?

Then use rest of money to either get a case or a screen. Also tempted to sell my 7800GT and downgrade to a 6600GT for a bit until DX10 GPUs come out (next game i'm really planning on playing will be UT2007, will this be multi-threaded?

What do you thinki ^?

Thanks very much for the help, i'm so confused as to what to do!