It isn't that a suspension lift gives you any "problems" per se; your CV axles just take a serious beating because their angles increase (therefore the boots are prone to tearing). A suspenion lift for a R50 is actually a great improvement, at least in my opinion. I find my truck handles better, rides smoother and just feels all-around nicer than the OEM set-up.
If you ever install a suspenion lift, you'll definitely want to consider manual locking hubs. These will disengage your CV axles when in 2WD, putting considerably less stress on the front drivetrain. I'd also recommend beefing up your CV axles (AC makes a nice set and they work great).
With the R50 being a unibody, a body lift isn't possible. Read up on the subframe-drop threads in this section. It's chock full of useful information on how a SFD works.