arrghhhh......... I'm so confused now..... The 5830s are really in the sweet spot, but the
6990s can be consolidated in one computer. I can setup 3 quad 5830 rigs for around $3000 AUD
giving i presume around 3000mhashes ? but for around the same price i can get a single
rig with 3 6990s which will not get anywhere near 3000mhashes

What are you thoughts go with 3x quad 5830 rigs ?

or

What are the chances of me detecting a block in a month with a triple 6990 rig ? or would 3x quad
5830 rigs be better ?

Does more consolidated power mean better chance ?