beard trimmer! I can't imagine doing anything else. Sure its not the closest shave, but I shaved once with a razor, and yes it was awesome and smooth at first, but the next week was hell, I was itching so bad! and its not like a scratch you can really itch too much in public...
I got myself one of these cool razors by Gillette, one side is like the mach 4, and the other end of the razor is a trimmer. that works just fine and its water proof too, so you can do it in the shower, id look around for something like that
I like using electric for facial hair the best. Its quick and efficient, especially cause I'm not a morning person at all. The only down side is that I don't get as close of a shave using it compared to a razor like Gillette, so shaving is required at least every other day.
I suppose it depends on the look you are going for and how much time you have. I have a beard trimmer for my goatee and I also use it if I've been a bit lazy and need a quick tidy up on the normally clean shaved sections. Otherwise it's wet shave all the way, electric razors don't handle the stubble properly for me.