I had several clayton products on my TJ Rubicon. I have not followed them much since 2010 or so. But back then in the mid to late 2000's their products were highly favored for being overbuilt, with great welding and the company for superb customer service.
And FWIW I think you are making the right choice oin 35's over 37's (and all the associated other enhancements to get there). Once again, going back to my 03 TJ Rubi, I scrimped and saved to get all I needed to go from 33's to 35's. This is a comparable jump as you are describing due to wheelbase and what the relatively stock platform can handle. After all the time, energy and $ spent, I saw negligible improvement off road... so little in fact, that I returned to 33's with my next tire purchase. I swear the Jeep was a better offroader (at least with me driving it) on 33's.