I'll add my 2¢ in for the Tamiya kits.
I've got a 1/35 Porsche turret KT with the zim, screens, and indy tracks waiting for me in my stash.
I've built the 1/48 and it stands out in my 1/48 collection. Simple, yet detailed.
I've built enough Dragon kits to know they can be a bit high in parts count, but they build up beautifully if you can wrangle them into submission and stay patient with all of the tiny bits.
The Dragon SU-85 kit however gave me no issues and it has built up very well. It's an older kit and the engineering was well done.
But I'd go with Tamiya. Excellent engineering and plenty of detail to please the eyes. Also, lots of after market goodies if you're not happy with just the kit.