I use ernie balls for my electric, and i try to keep the guage heavy but i also gotta take care of my fingers. My personal opinion on acoustic strings is that martin marquis have to be the best. They have a very nice tone, ESPECIALLY when brand new. I dont think I can imagine using anything else for acoustic.
I hear those fender bullets are supposed to work pretty good for keeping your guitar in tune when using a whammy bar by not letting the strings twist inside the bridge.