It's not the most sophisticated thing in the world, but I really like my Black and Decker "Bulls Eye" combo laser level and stud finder. It's the best stud sensor I've had. And it is useful for projecting a level line. It's around $50.
I'd bought one of those cheapie $20 laser levels at Costco a while back and found it totally unsatisfactory. You need a serious tripod to make it work--the tripod probably would cost MANY times the level! (The tripod screw isn't even the same thread as a camera tripod!)
The B&D model, you can hang on the wall and its internal pendulum maintains level. Not bad!
Of course, now I've found that the HOUSE is even more "off" than I'd thought!
[This message has been edited by k2 (edited December 15, 2003).]