Theres a new tuner in town that can tune 250/200's to be smokeless, cool, and towable at high altitude. On one tune.
Not taking anything away from the tuner you're hiding in your
pocket, but I'm 100% certain there are several "old" tuners who are capable of such too. Your new tuners experience at elevation/towing is going to generate some interest for sure.
To the OP-
I'd decide on who's 250/200s you want to buy, then ask your injector builder who their tuner of choice is. Seems like the injector builder/tuner kind of compliment each other in the 7.3 community. That way if there's an issue with how your trucks runs later down the line, you potentially have a team of folks helping you out, not two folks potentially pointing fingers to solve problems.
I'd also contact each tuner your considering, and ask questions regarding responsiveness to reburns for component changes/upgrades, or individual truck/driver differences. As mentioned above, some will support a TS Burner, others not.
If you were able to later get your truck live tuned....that would put that tuner/injector builder team to the top of my list. WOP/DP Tuner comes to mind being close by...
FWIW-I have nothing but awesome things to say about my experience with Unlimited/Gearhead. Just pulled another tank at 17.7 mpg....that tank had about 2 dozen dyno runs on it too!