I'm with Midchuck and Matt on the four-fingered G. I learned that way, and anything else sounds less full. I have been concentrating on the e-form barres (the bar F previously mentioned) and find it is the key to many chord progressions, Dylan's Like a Rolling Stone for example. Unfortunately, my barres still sound muffled compared to the open forms.

Re: the B chord. To me the only good B is the e form B slid up the neck. The A form barre B always sounds muted.