Advice needed as to Upgrading or replacing

[Blytz]

The core of my current system is as follows:

Asus P7P55D-E LX
Core i5 2.4ghz processor
Sapphire 5850 1gb
4gb Corsair XMS 1600
Antec 300 case
Corsair 650w psu
Benq G2420HDBL

Now unfortunately something happened to the gfx card the other day during a Diablo 3 session when the display turned pure white. After a cooling period when I rebooted it has left 2 vertical 'strips' that are distorted. This prompted me to consider whether replacing the gfx card alone is worthwhile.

So should I bother upgrading around the bare bones I have or just buy a new system? I mostly play MMO's but also Skyrim, ME3, Diablo etc. My budget could be up to c£1000 but if I wait 6-12 months it'll be half that at best. I like having a decent machine and this one was feeling a little behind in Skyrim.

 

[Blytz]

Thanks for your reply! The HDD is a Seagate 500gb 7200rpm drive.

I can o/c quite easily to 3.2ghz and have just done so, but after dropping my monitor during a move over the weekend i now need to replace that too! So, is it possible to run something like the Samsung S27a750D 27" with my current rig but replacing the GFX card and upping the ram to 8GB? Or should i really just rebuild and cannibalise certain parts, if so which ones?

Once again thanks for the advice, i do appreciate it as although i have built many systems in the past now that i'm 'old' I don't have the time to keep up to date with stuff!