I dunno, looking at it from the outside, I think I'd start out with a BL first. If I needed MOAR lift I'd then add the suspension lift. At least with a BL you're not changing any suspension geometry or anything, so ride quality isn't sacrificed. Not to mention the price comparison of a BL vs. Suspension lift. Like I said, I know very little about lifting a truck, but I'm just calling it like I sees it.
Ok, just read through this whole thread... My opinion is the RCX lift is horrible!, I ran it long enough to know... All you guys runnin the RCX down on southern roads saying the ride quality isn't sacrificed I invite you up to Massachusetts to squire your rig about the pot hole ridden winter beaten roads and I think you'll change your mind, the RCX rides like a wheelbarrow. I'd take the body lift over the RCX any day. In fact I did, I got rid of the IFS all together No I didn't have aftermarket keys yes I "de-cranked" my keys to regain some ride, still horrible... I ran 33s, 37s and 39s on it and I don't like it. I now have a leaf sprung front end and I'm not scared my truck is gonna rattle apart from the cheap suspension lift... If you wanna keep the IFS, save yer pennies and get a camburg kit our somethin up to par with it