6600GT and 6800 (vanilla / LE) perform about the same.
Currently the 6600GT costs under AU$250
6800GT performs much better than the 6800 (vanilla) though, the GT is almost twice as powerful, due to more pipelines, higher clocked GPU and faster Video RAM.
I recommend: http://www.staticice.com.au
; for pricing info for Australian PC builders.http://users.on.net/
~darkpeace <--- I am with Internode, the best Australian ISP. - Wink
So in summary, you got a decent deal on the Asus V9999, assuming it is a GeForce 6800 GT or 6800 GS card. If it isn't then you just paid a large premium for the 'Asus' logo.
Check (current) GeForce 6800 GT prices for Australia here:http://www.staticice.com.au/cgi-bin/search.cgi?q=GeForce+6800+GT