Might I add another choice to the mix? I prefer ARB air lockers to any of the above choices. E-Lockers have been known to break small parts in jeep applications when pushed and then not have any support from the mfgr. This was a point brought up in a thread on jeepforum.com.
A full Detriot, while bulletproof, is a PITA on the road in normal conditions and I guarantee you will be more than exciting to drive in icy/snowy conditions. I have personal experience with driving my fathers truck for a week as his has a full Detriot in the rear and a Tru-Trac in the front. Every corner you accelerate out of, even gently, results in squealing tires. He has considered swapping it out for this reason.
The ARB is a known, reliable and extremely tough unit that when unlocked functions as an open diff. When locked, it is fully locked and functions like a spool. The point being is that YOU decide when you want a locked diff by pushing a switch.
I would go one of two ways...either ARBs if I needed that kind of traction or Detriot TRU-TRAC limited slips which are completely street friendly but work exceptionally well in tow rigs or mild trail trucks.
2001 F-350 CC 4x4 XLT PSD.,Pro Comp 6.5 suspension, 325/65/18 Nitto Terra Grapplers,18x10 Ultra Chrome Predator 8s, Trenz Grill,AMP Research Power Steps,X-Monitor,BD Pressure-Loc,SCMT,4 in MBRP Stainless exhaust,Tru-Cool Max,AFE Magnum Intake,Wicked Wheel,BRPV,203* stat,Western Diesel Turbo BrakeIII,Sonnax/Tri-springs,1400watt Pioneer/Polk Audio/Fosgate stereo, pre-pump & tank mods,ORU diff covers,acetoned badges,zoodad mod,heater core bypass,Friends of Oceano Dunes supporter, American Sand Association supporter. KEEP THE DUNES OPEN!!!!!
98 Jeep TJ, 5.7 HEMI/545RFE, RE 4.5 LA,35in MTRs,JB Conv.231JHD,G2 D44, HP 30,ARBs,4.10s, Gen Right Alum. fenders, Premier Power Welder, Warn 9.5 CTi, LoD bumpers,LED lights.