anyone?

Hi there.
I have two Gigabyte R9 280x's

what is best config? I want to add 2 more soon as well.

is GUIminer-scrypt good idea for me?

I try to configure with cgminer I try to follow other peoples examples but I get HW errors too much I think.
I can hit ~750-760kH/s but mining website pool thing isn't registering any work I try a few different pools.

Any help would be great, If I make good example of this test machine I have interested investor who will want to build a farm.


Thanks.