If I want to just trim my shit down and go for the stubble I use a Wahl. Shits legit. You dont need to use a screen with it you just need to be careful. I picked up a cheap ass one for ~$20 at frys but I plan on getting a nice on at some point.
http://www.wahl-store.com/detail/WAH+9854-600
Paid $20 for it and only use the trimmer head and nothing else. Just take care of it and keep it oiled/clean.