With no tweaking and just entering parameters in the bat file, I'm getting 3.2 Mh/s on 280x (Sapphire and HIS) and 2.6 on 7950s (Sapphire dual-x). Good stuff.
THIS IS THE BEST ADVICE IN THE THREADI was hashing at 2.3 with sphminer, upon the first release of the x11mod miner I was up to 2.5. After reading through the thread I tried the default settings and now im hashing away at 3.44 m/hs on a 290. Thanks everyone!