Well... here is my 2 cents.
Razors take time and you have to do it something like every other day or you'll get 'prickly'. And they have the nasty effect of leaving red spots (on me at least).
An electric face razor is probably the way to go, but I have not tried this yet.
This works well for me: Electric hair clippers with no attachment. Sure it's not as close a cut as a razor, but it's fast, leaves no red marks, and you will probably find you only have to use it a couple times per week. Also if you were going to use a razor, I'd use this first... makes the job easier.
Hope this helps...