Have you had a lot of cars stolen? Or do you live in an area with a lot of car theft? I'm only asking because in nearly 40 years of car ownership (since 1979) I can honestly say that this has never been a factor I've considered when shopping for a vehicle.
As far as your choices go, I currently own an 04 Suburban and previously owned an 07 4runner.
The 4runner was a great vehicle and I loved it, but it didn't quite have enough power or enough room for pulling our trailer and hauling all our stuff on camping trips. The V6 models have a slick "multi mode" 4wd system that lets you run in 2wd, 4wd with a center differential (basically full time 4wd or AWD), or 4wd with a locked center differential (conventional 4wd) for off road. At 236hp the V6 isn't a powerhouse but it's decent if you're not pulling a trailer (and honestly, lots of people pull trailers with them, I just found it to be "marginal" in terms of power when pulling our 2000# travel trailer across the country.) The V8 is nice but the V8 also gives you full time 4wd with no way to put it in 2wd. MPG on my V6 4runner typically ran 15 - 16 in town and on the highway - not towing - 20+ was fairly easy to achieve. With a 23 gallon tank that led to a decent range.
Pulling the trailer was a different story, MPG rarely exceeded 11 - 12. To put it another way, I've gotten better MPG with my V8 Suburban when pulling the trailer, as high as 14 on long highway trips.
Is there any reason you left the Nissan R51 Pathfinder (2005 - 2012 I believe) off your list? The Pathfinder of that generation was a body-on-frame SUV that was a bit longer than the 4runner and most models had 3 rows of seats. It had a larger interior compartment and would certainly be a great suburban vehicle. Unlike the 4runner which had a solid rear axle, the Pathfinder had independent rear suspension. The Pathy also had a more powerful 4.0l V6 than the 4runner. Unlike the Tahoe/Yukon/Suburban of that era, the Pathfinder had a 5 speed auto.
There were some models that had a V8 (the one pictured has a V8) and the 4wd V8 models had full time 4wd.
I sometimes think if I had gotten an R51 Pathfinder instead of a Suburban I might still have it since the more powerful V6 engine would have made pulling our trailer easier.
IMO one of the biggest drawbacks to the 4runner is the dreaded "Toyota Tax" that you pay for one. An R51 Pathfinder would give you many of the pluses of the 4runner without paying the Toyota Tax.