System Upgrades?

[Recursion]

Graphics card sucks, just about the only thing worth upgrading in that thing at the moment tbh.

[AgnesIO]

You stalk me too much... I have 219GB free. :]

Everyone knows you like flight sim matt

[StefanWolves]

You could bump up to 8GB if your a spoilt perfectionist like me, tis what I would do anyway if I had the money & a system like yours, and I would upgrade the GFX card, but as suggested above, save up for a few months, maybe a year, then do whatever you want with your money, you might not even be as interested computers in a year or two, so don't go wasting your money just in case.

My opinion anyway,

[ElliottThompson]

What kinda PC Case you got and Fans ect because with a 450w psu there are some limits to what you could upgrade depending on how many watts of your psu your already using. Uhm if your using most of it crossfire with 2 grfx cards is out of the question. Also after upgrades PC's tend to get hotter with the extra componants heating it up plus extra power being used so you may need to get extra cooling from fans which would use up more of ur psu. If you do end up needing a larger psu I would personally recommend the OCZ stealth series because they are just so quiet
http://www.ebuyer.com/product/152506

Edit:
http://extreme.outervision.com/PSUEngine
Just bumping up my graphics card from a single card to two in cross fire required 230 extra watts

[Turbocom]

Well, I'm guessing its CAD. Save it up for Windows 7.