...this is really something you should make the call on by simply driving everything you can get your hands on & make that salesman earn his commission! you are only going to get opinions posting a thread topic like this (yet again) and some of those opinions are not very educated.
i will tell you this, i would of bought the Trail w/KDDS had it not been sold a couple of days after my test drive. after two weeks of looking for another like vehicle, i gave up and bought an SR5. i didnt even test drive the SR5 before i bought it. however, after a few days of owning it, i knew the suspension was going to have to go.. and fast!
if you are really concerned about having the kind of ride you want & prefer... save your money and pass on the Pro you seem to have your heart set on. then, go buy a FULLY ADJUSTABLE Fox or Icon suspension system. you can then adjust any spring pre-load level (not just a few set levels), high speed compression, low speed compression, etc! want a cadillac ride, easy to do. want it to corner like a BMW X5, easy to do.. the customization is endless.
trust me, it may take a week or two to "fine tune" the suspension, learn the various adjustments and pay for a few alignments, but once you find the sweet spot for your butt behind the wheel... you will never pine for any of the Toyota OEM suspension setups again. and no, i dont regret not getting the Trail version at all now.
good luck in whatever you do. i admire your quest for complete research before you pull the trigger. ive bought a few vehicles in my day and look back wondering, "what was i f-ing thinking??!!".
Thank you for your response and for continuing to help and answer my questions.
I stopped by a dealer today and took a look at an SR5 (the only 4Runner they had there).
After finding that all 3 of the trims in question have the same sound systems, speakers, reclining rear seats, power outlet in the cargo area, etc., etc..... It made me realize that the only difference between the SR5 and Trail is that the Trail has CRAWL control, Terrain select, locking rear diff, and KDSS...
I'm honestly not sure I'll be needing all of the off road aids, although I would looooove to have them, and it never hurts to have features you won't use often...
However, if I'm honest, the SR5 may be all I need considering I will spend most of my time on the street and will not be doing very much hardcore off roading. I plan on hitting the beaches during the summer, and finding dirt roads to go down and explore... I suppose you can say I will be using it in an "Expedition" type fashion moreso than a rock crawling one...
The ~$35k (right?) for a SR5 Premium does sound very attractive to me compared to $39k for a TRD Pro or even $37.8k for a Trail Premium w/KDSS.
I am going to test drive the SR5 tomorrow. I will have an idea about how I at least feel about he SR5 suspension then...
I just looked at the price of the ICON suspension kit. Holy crap!! $1774 for the cheapest one! I'm not sure that will be a route I'd be willing to go, considering I'd be evaluating the SR5 as a purchase option to save money to begin with.... Hmmm, something to think about