I started bitcoin mining with my new 7850 a while ago, and so far I've done a bit of mining. I've overclocked my video card from 860 MHz core to 1000 MHz (no overvolting). I mine using guiminer on the deepbit pool, and average about 280-300 MH/s consistently.

I have a few questions, though:

• What should my expected MH/s be? Is my current rate good?
• Are there any "extra flags" I should be putting in to maximize my rate?
• Would it be profitable for me to mine with this setup with an electricity rate of approx. $0.10 per kw/h?

Thanks in advance.