Glad I bought 5 of them when I did.... getting a solid 310-315 per card.
at what settings?
300 should be easy to get. I wouldn't worry about getting over 300. The amount of overclock, the increased power draw, increased heat, isn't worth it. It looks cool when you tell other people but squeezing out the last 10-20 mhash cost you money.
At 930/320 you'll hit 300 easily.