If you want to lift it... then do it... spacers are just that... spacers... it will get you by, but I can bet you will get coils eventually. Better ride and more flex. I ran 2" BB for almost a year and wheeled every weekend on 31's. It got me by while collecting components for a REAL lift.... You only need spacers and correct bump stop extentions for a 2" lift... no need for shocks, unless yours are shot.
I have Rocky Road Outfitters Adjustable Control Arms.... beefy and no issues.... what you are getting is not really a performance issue to compare IMHO.... spacers and BL are not big performance comparison items
~Todd~ 2004 X 4.0 5 speed---SOLD
4" Lift, 4.56's, 33" Duratracs on M/T Classics
RR SYE, Tatton CV, MML, BL, TT, Dynomax Exhaust
Hella Lighting: Driving, Fogs and H4 E-Codes
... and NEVER will be