Ideal 20" Tire Size?

[Boyd]

I tried searching but had no luck (ok, honestly, I gave up after several tries - the "must wait 60 seconds between searches" thing was annoying)

I will be running a static 5.5" drop in front (2.5" spindle, 3" coil) and 5" coils in rear.

I've never had 20" wheels before and I'm curious what the best tire size is? The combo I'm looking at getting is 255/40f and 285/40r but I'm concerned about the sidewall height, I don't want the rubber band look.

Anyone have pics of a 40 series tire? What about a 45? Thanks in advance.