More power is readily available for the Jimmy.
New heads and a cam will wake that thing right up.
As to "nimble" I am not sure what you mean, but my '73 K20 Suburban got around pretty well.
In 20 years that Jimmy will be even more of a classic, and odds are the Rover will have met the crusher because there will be some system that needs parts that can no longer be obtained.
Whelp, i pulled the trigger. After thinking about it and regretting at first..i did the trade. I just could sort the front end issues i.e. sterring..it wandered all over the place. After welding g frame, 2 new steering boxs, stabalizer, all new bushings several trips to alignment shop, and still wandered. It was work and exhausting on long road trips. Also, after all the dound deading material throughout the truck, still could quiet up the truck. Here the kicker. I told the new owner about the sterring and othe minor issues. Guy took the truck out and ended up rolling it into a ditch off the freeway...they very next day of the trade. Hes fine...truck not so.
As for the Range Rover county lwb, i did about 250 miles this weekend about 30miles on dirt...must say, so far very happy quiet, smooth, quick, very capable..yes, it has its share of electrical issues. Power mirrors, drivers power seat intermittently, heated front windshield, heated seats..all not working, but dont care..windows, wipers, lights, a/c and heat, guages all good. Very impressed with off road capabilities..
Again, thanks for your input, i truly appreciate it.