I have an 88 v20 suburban that i just installed ord 4" custom springs, xover steering and their front sway bar. I need new shocks and have been thinking about the bilstein 5160s or the 8100s. Is it worth the money to jump up to the 2.5" shocks? The suburban is setup for overlanding which means i do a little of everything as far as mud, rocks, desert, fire roads and street driving. What do you guys think?