Welcome from one n00b to another :-)
Thanks! 
Just out of curiosity, how well do the amd cards mine? How many mHash/s?
Hmm they are different I think. Getting around 650KH/s from Gigabyte R9 280X (scrypt). Some get close to 800, some just around 550. Getting a high hashrate is easy, but making sure they're valid is something else.