In reply to BnB:
Well, DMM Bug and Bugette together will cover 7.5mm-11mm range while BD ATC Guide (or XP) covers 7.7mm-11mm. Not a huge difference, but you end up with one belay device, hence less hassle.
I guess as a first belay plate, it does not really matter which one to buy as almost any will do the job for regular type ropes. I bought ATC XP as first one and when I needed another one (we used to share one with my flatmate) I went straight to ATC Guide. There was nothing wrong with XP, but few extra pounds give a better variety of use. A year ago I was top roping at the wall, now I have done trad single and multi pitch climbs. You never know what will you need, so it's better to have another feature "just in case"!