My 2004 has 673k, still going strong, but it is rusting out pretty bad. So sooner or later I will need to replace it. I am looking around and if I find a Texas t1n somewhere at a good price (no rust) I will jump on it, just because of my experience with my t1n. Yes, I rode in a ncv3, they are bigger and quieter, but I have experience with the t1n and I can pretty much fix anything on it myself. Haven't needed to take mine to a dealer, or shop since many moons ago when it was still under warranty.
Speaking about Promasters and Transits, as of now, I ain't interested. They are still too new to know how reliable they are. Promasters are butt ugly, so, no way am I paying money for one. Transits are not quite as good looking as Sprinters, but they are more manageable.
Another thing to consider is diesel vs gas. These small gas engines that they put in Promasters and Transits just don't cut it for me. They just don't produce that low rpm torque that I just love. I love going up Mount Eagle here in TN with 2000 lbs of freight in the back and the Sprinter just purrs going up the hill, not even flinching. Only thing you notice is the nice turbo whine. Promasters and 3.7 l normally aspirated Transits are so wimpy, that they need to downshift every little hill they see. Heck, the promaster that one of my friends is driving downshifts even for a headwind. Another friend of mine drove a Transit with the 3.7 and it was even worse. Straight road, just trying to accelerate from 55 to 65 mph it had to downshift. I don't know anybody yet with an EcoBoost equipped Transit, diesel Transit or diesel Promaster.
Call me crazy if you want, but I love Mercedes and I love diesel. So for now, my first choice is another T1N for reliability and fuel economy, and my second choice is a Sprinter with the 4 banger. My overall fuel economy in my t1n is a little better than 26 mpg, which cost me on average a mere $0.12 for every mile driven. No gas van comes anywhere close. (BTW, I kept records how many gallons, price, and miles for every fillup, so that is how I came up with these numbers).
Just for kicks, the other day I compared my cost per mile with my friends cost per mile in his promaster (I get 26 mpg, he gets 17). So, even if diesel would be $1 a gallon more than gas, (usually it is about only $0.6), my cost per mile is still about a penny less than his.