7950's
Those are good settings for that card - without 3GB onboard, you'd have to make even more compromises on lookup-gap.

You might squeak out 5-10kh/sec more if you utilized a miner with xintensity

-g any higher than 1 makes no difference at these N levels on cards with 1024 shaders or more... even on the low end cards, they're able to max out at g=1
xD yea, I'm VERY tempted to try your yacminer now as I'm pretty sure I can get more as you say. Your miner seems a lot better to fine tune with. I'll have to check it out when I get more time to see.
Edit: I saw your edit. Yea that last TC tweak only changed maybe 0.4 KH/s so not a big diff and I cannot go over that without other issues.