Best aftermarket crawler seat, air or mechanical

I am currently running a D7h, mainly clearing trees off of farmland. The seat in my crawler is a Kab 301 and is a little tired, I could get new cushions but would like a little better seat. Should I go with the mechanical suspension or the air ride, and what brand is the best for Cat replacement seats. My local supplier has suggested an Ultra seat mechanical suspension J732 with medium backrest. Driving over stumps, rock piles,and blow dirt ridges, thought air maybe a little too bouncy