Jay has hit the nail on the head pretty good. The Slee newbie guide is mandatory reading. I'm an original owner of a '94 and very active over on IH8MUD, the absolute source for anything Landcruiser. Great sections there on both the 80 series (thru '97) and the 100 series (thru '09 I think). New 200 series is way expensive!
100's with the V8 will have much more power than the 80. The 80 has a solid front axle which some will argue is better offroad. Any cruiser at 150K is just getting broken in mechanically. Routine maintenance will have these engines running twice that and beyond. '94's (like mine) have had issues with head gaskets around 200K. Later models don't see to be as stricken with the redesigned gasket.
Bottom line - you can't go wrong with Toyota quality...and yes, I am biased.
'94 White LC; Kaymar Rear Bumper w/tire carrier; Hanna Sliders; ARB winch ready Front Bumper; Slee Transfer Case Skid Plate; BFG MT KM2 285's, OME 850/863 Heavy 2" lift, INTI Rack; Warn M12000 Winch, Snorkel; Sputnik!
TLCA Member #13420; KI6SGO