my opinion to you, after being down that road..
if you're going to beat on it(HARD), skip the IFS lift junk.. just SAS it. I had the RCD lift on my truck for just over a year and beat the living piss out of it, locked front on 35s i broke like 9 CV shafts (the 2 on the truck when i sas'd it were 8 and 9) i broke numerous brackets, bent the piss out of the drop bracket and lower control arms, broke a bilstein coil over, the other one was on its way out yada yada.
the moral of the story.. don't skimp out on you're truck. besides, if you have the tools and you and/or your friends can get it done.. why not
i only have $2500-3,000 in my sas so far but i have some of this and some of that still to do before i really hit the trail, and a few major things before i do anything extreme.