Look no further than the ACE DS1015. Best value servo out there. [email protected], I have one on my Xray XB8 steering for two years, still like new. Hitecs are always sloppy servos, in my opinion, I've tried a few and I'm never happy with centering. Other servos you could try are the Airtronics 94358Z, nice and cheap but not digital, or a Futaba 9351, but that's getting expensive.

EDIT: And yes, you're right, ideally 200oz-n is what you're looking for.

EDIT2: Oh, yeh, by the way, don't even consider running a high dollar servo with a '4xAA' battery holder. Get a decent receiver pack. AAs don't have the current draw to drive a good servo, and besides they'd be dead in minutes.