Uhm, are you underclocking/undervolting your cards? 800-1200 with 2x 7970s seems a little on the low side of things... targeting 75°C with cgminer I has around 600 on a single 7970.
Anyhow, I've looked around the various pools and some specific cases aside (as organofcorti mentions, I'd stay away from yours tbh) they are mostly similar to each other.
At the moment I've been on Bitminter for a while and it's nice... large enough to have some reasonable stability at a (potentially) very low cost. Ineed by default you are "donating" 2% of your earnings (not a bad rate) and having in return instant crediting. You can disable this perk.
I havn't tried the other two suggested above.
Deepbit or 50btc will charge you much more but if you're after less varibility of income they obviosuly have their large size on their side.
In the end it really boils down to what features you're after. If you want 100% payout then you can look at things like p2pool, but it's already slightly more complicated to set-up.
yes you are quite correct in thinking that i should be getting much more. i said on average because for some reason over the weekend the 6870 was only producing 30
but that has been fixed now.
i have only been doing this for a few days
i will check out bitminter thank you