Like others have said...you really should look into brakes, at the very least. I'm not going to tell you to not run 37's. I say go for it! Its your jeep, who the hell cares what I, or others think. BUT, you should be able to stop those things in an emergency. I'd be SUPER pissed if a guy rearended me with giant tires and little tiny brakes.
Since your using it as a marketing rig too (and I assume taking the tax writeoff) I'd go metalcloak long arm. Not because the ride is any better, but because they are shiny gold in color. You want attention, and Metalcloak knows how to get it.
Personally, I run Currie arms and I actually noticed an increase in ride quality when I replaced my worn out stock arms for Johnny joints. Having never run the metalcloak's I can't say they won't be better...but, I do know that shocks play a MUCH bigger role in perceived ride quality than suspension joints do. My educated guess is that your ride quality will be shitty no matter what due to the 20's and 37" tires tho.
Good Luck!