WolfWhistle, this may get a little long winded but somebody might benefit from all my trial and error.
I started RVing in a 27HFS. Pulled it with a 1/2 ton 09 GMC Sierra 5.3L and Blue Ox WDH. Wrung the truck out like a dish rag. Went to a 3/4 ton GMC 6.0L much more stable towing. Love the 27HFS, I call it "the little big trailer", but getting a little tight with a growing family of 4. It has been a great camper, not any issues except a brake wire came loose at the drum.
Wanted to upsize to a 30HFS 5er, but they came and went like a 18 wheeler in the night! Looked at the 30HDS when it came out, but almost felt like I was making a parallel move and might be looking for another trailer in 3-4 yrs. Didn't really like the two dump connections on it either, if I'm hooking a sewer hose to dump, one connection is enough
! Never had a 5er before, but always heard they were more stable towing.
This brings me to the 29UDQL5. Like you said its "not over the top" and thats what I wanted. I wanted something in the 35 foot range and there is only a couple of them out there in this range and weight. I chose XLR because of my current experience with the Hyper Lite and the other brands that I looked at did not seem to be as good of quality. I call this 29udql5 "the little big 5er".
To answer your question, I will be pulling it with a 06 Chevrolet 3500 w/ a Dmax.