I like your numbers!
I downloaded and burned the Starminer image yesterday. I haven't mined with it yet - just booted up the Pi. I think I'll end up using it.
Dmaxl's beta 2 is pushing the 24hr avg up for me.

I think it was 1,586 kh/s when I started using it 4+ hrs ago and now it is 1,601 kh/s. WU is at 1,542/m after running 4+ hrs.
I was going to switch pools but I think I'll let this run 24 hrs just to see what it peaks at.