Well then I'm probably best example you're going to find. Like I said, I'm a 7" and it's about a 4" on a 4wd. So a 4" on a 2wd is like a leveled 4wd.
Not worth the time/money IMO. Just go all the way. I have a fabtech kit, CST also makes a 7-8" kit (but I've heard a few complaints about their upper control arm configuration.)
There is a ebay kit for under 800.... I don't have any experience with it, but you get what you pay for, and the suspension needs to be strong.
IF you're short on money right now, I'd just throw a body lift on. That will be my next mod, but that will give you 3" for much less money/effort. Will give you a chance to save up and go with a full suspension lift if you want.
On a 3" body, you can fit a 265/75/16 on stockers all day long. 285's fit with a lil trimming (or a 1" spacer above coils)



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