I have and very much like the HO. Some say you can get more power for the $ with mild bombing of a non-HO due to the first-time cost of the HO option being more than the cost of some minor modifications. Others say the HO is a better starting point because several parts are heavier-duty. I have found that for me, the HO is enough power without mods, thus leaving my warranty intact, but many want more power.
Either way you go, I don't think you'll really be disappointed.
Be sure to get the NV-241HD transfer case; no sense in having this much power and not getting the HD transfer case. It may be included in some packages, but check to be sure.
One last thing - don't expect to win stoplight races with a manual, unless you're really willing to abuse both the transmission and your clutch. The power is there, but you lose too much time at each shift. Do I prefer the manual anyway? You bet! (I just recognize that there are lot of good reasons to choose an automatic too; each person has to weigh which features are most important to him/her. )