How much high speed/long distance commuting will you be up to? I'm on 33's at the moment, and I'm planning on going to 4.56's in the near future. I was thinking of even just bumping it to 4.10's, but at some point I may go to 35's and I only want to do gears once.
IMHO, If you're going to drive slower, or go trail rig only, 4.88's for sure, especially if you had a manual tranny. But if you're commuting and will regularly see 70-80mph, like I do, then I wouldn't go bigger than 4.56. The A4LD will actually soak up a good amount of abuse, as long as it doesn't get too hot, so going with a 'balanced' gear setup to me would make more sense.