About to get the lift and tires...

So I've decided to go with the Bilstein 5100s for a 3 inch lift and new tires.

Questions:

1. Do I need all 4, or is just the front 2 to level good enough; what are the advantages of replacing all 4 and is it worth it.

2. For the tires I'm going with A/T's (unsure of brand thus far), but need advice on size... 31 or 33? Mostly wanting to see if 31's will look goofy with the lift, cause I'd rather not go huge and deal with all the accompanying issues.

3. I have a friend that's a Porsche and has offered to help me install. Is there any reason that I should get the shocks installed professionally?

Once again, thanks for any help given... You guys are awesome!

 

First you only get up to 2.5" and even then you might have to trim to fit 33s(285s) go with 265s(32) and don't worry about wheel spacers and rubbing

 

Cool, I already have BFG T/A 265s... Not that big IMO