I have the SB. Was concerned that it would be a problem pulling the 5er, but nope, no prob. The slide hitch may be needed someday, but havent had to slide it back yet.
Truthfully though, if you dont mind manuvering in tight places with the long bed, I would go for it. I miss the capability of adding the 60 gallon tank under the bed (which you cannot w/ the SB), and will probably miss the lost room from adding an in-bed tank.
It really depends on if you mind turning the long bed truck around in tight places or not. Either one will do the job, just the extra room would be nice.
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2k, 25k miles, QC, SB, 4x, 6sp, 3. 54, 285/75r16 bfg/at, stock air cleaner (reliable), silencer ring "in" (runs better), Sunnybrook 28' fiver, 15,000 lbs. 18. 5 mpg (unloaded), 11-12 mpg (loaded). VA, DD1's, PS Boost module & elbow... also, Nitrous Oxide piped direct into the block (stealth - to keep the warranty), twin turbos, 10 gallon per minute fuel pump, ECM right out of Don Garlit's Top Fueler (he gave it to me) (for letting him ride in my truck), Super Modified DD1 Injectors ("Hand Honed" with a 1/4" reamer & my 12v (thats "volts" not "valves") Makita).

More BOMBING to come!!