What Would You Change?

[gib786]

This is my current spec:

AMD 64 4000
MSI K8N Diamond
1 gig corsair xms
7800gtx
2 x 120gb hd's
antec truepower 550 psu

only built in 3 months ago but im wanting to upgrade it a bit, mainly because it can be sluggish at times, what would you reccomend? (budget is about £250)

 

[gib786]

the main one with xp on it is sata, the 2nd one (used for backup) is ata



usually have around 47-57 processes running at any one time