I had a 2012 Single Cab Ram with the Hemi. I never had any problems with the truck, it was great. I towed a few things with it (a 26' enclosed trailer, empty, was probably the largest/heaviest.) and it never really complained. That being said, I know I never really pushed it to the limits or abused it, it was mainly a daily driver for me. It was bigger and faster, and in some aspects (towing mostly) way more capable than a 4Runner.
Some had mentioned poor full economy, I think I probably averaged similar to my 4Runner (I've had the 4Runner less than a week, so not exactly a thorough test).
I got rid of it for a few reasons. Mostly, I should have got a crew cab. At the time I bought it, I wanted 4WD and a V8, and cheap. While its really great to automatically eliminate yourself from driving your group of friends around, not having a secure area for your stuff its a pain. And full size trucks are just big. As capable as they are, a new Ram Crew Cab would not fit in my garage. Although we'll move in a year, I just don't really want something taking up that much space in my garage even if it technically fits.
I've had a few things since then, sedans (WRX, Fusion Sport) - what brought me to looking at 4Runners was frame based, size, and minimal depreciation. Something you won't get with a Ram. Buy used, they ran a dirt cheap lease deal for so long trying to be a sales volume leader that the market is flooded with them. You can get a barely used well equipped 1500 for $27K.
While I can't knock a (used) Ram purchase. I just don't have the need to mess with something that large right now. I'm 6'3" and 220lbs, and I fit in the 4runner just fine, more than fine actually. There's enough space in the middle seat for me too. The enclosed area will be great for the dogs that are coming next month. Not sure on how you feel the 4Runner TRD Pro is a "young persons car" - I somewhat feel the opposite in that, its probably the more pragmatic choice. I have a TRD-Off Road, which you might consider, but one can hardly argue with the cool factor, and the resale value on top of the already great 4Runner resale value probably means that if you decide it was a terrible mistake, your $ lost will probably be minimal.