Hamilton Beach, 5 speed. I really like it for just what you are talking about... I would never mix anything "heftier" than a cake batter with it. Wouldn't dream of using it for cookie dough!
But for cake mixes (yes, I use those!), whipping cream/egg whites, etc, it's perfect.
I hear ya about working your wrists to death, sometimes a balloon whisk is O.K., but having a lightweight hand mixer does come in oh so handy (so to speak).