Need advice on building the ultimate gaming PC

APPROXIMATE PURCHASE DATE: Next week
BUDGET RANGE: Australian $~3500, can go higher but would rather notBefore / After Rebates do not apply

SYSTEM USAGE FROM MOST TO LEAST IMPORTANT: Gaming, web surfing, Fraps, Video Encoding

PARTS NOT REQUIRED: Speakers, Headphone, Mousepad, Keyboard, Mouse. Just require the box + monitor

PREFERRED WEBSITE(S) FOR PARTS: www.pccasegear.com COUNTRY OF ORIGIN: Australia

PARTS PREFERENCES: None

OVERCLOCKING: Lightly (+.5 ghz) SLI OR CROSSFIRE: Yes

MONITOR RESOLUTION: 1920x1200

ADDITIONAL COMMENTS: 1 24" Monitor needs to be included. If struggling to meet budget, I can recycle my current Thermaltake Black Armor case, but would rather a new case as that one is ~4 years old.

Do not care what the case looks like, but it will be on carpet, so if there is no dust filter I probably wont go for it.

Had in mind 2X 5970 as the new Nvidea cards appear to run too hot (we get warm weather here, I don't need a heater in my room during summer lol)

Not very confident with watercooling, haven't done it before.

Comp will be used over the next 4-5 years for the purposes listed above (ideally)

Please use the webiste I've linked for assembly, they have the most reasonable prices in Australia & a fairly good range (except maybe monitors)

I look forward to your suggestions!