I have but have seen a a good number of people having issues with warped wheels on their 3.8 size tires.
Thinking about grabbing some Mojave tires from Jenny's. Pretty close to Talion size just more narrow. haven't heard anything except good things about those.
No experience with PowerHobby stuff. I see they make some belted tires for the Maxx. 5.6"x3" is a nice size, but if they're junk, well, worthless then..especially for $100 a set..plus they're +1/2" offset..
I know you like ur rigs with "a 'lil power" under the hood too. In which case, hard to pass on the perennial favs like Pro-line or even the Fortress. I'd say maybe MethodRC but their tread isn't very aggressive..
FWIW I am pretty sure I've seen folks push Fortress 6s to around 70mph..that's pretty impressive if the size works for ya.
Oh, and I don't think the Katar T's are really any wider than Fortress 6s, not much at least. I have both at home, Katar T's are a touch taller.
I'd give ya my Katar's, they're non belted though. Not a fan myself. No real grip to them.
Also, the Katars are a true zero offset, the Fortress have a bit of positive offset, maybe 1/4"? May or may not matter for your use though.