Bolsters and lumbar features, IMHO, are fairly similar across brands. Additionally, they don't take the brunt of your rump as does the seat. I'd look for seat comfort first and foremost and go from there.
I was very happy with product selection, price, and customer service. I would recommend going to a few dealers and sitting in one before buying. It's amazing how different seats feel to the rump.
https://www.seat-specialists.com/
I appreciate the replies. You'd be surprised how many TopKat blocks I've put out that always get eaten; both inside the RV and outside around the wheel wells. It looks like I won't be able to endorse the product.
If you're only showing a little tin in an engine with almost 900K, you're doing dang well. I perform OAs on a regular basis for my commercial truck. I use Blackstone.
Can you be more specific in describing exactly what's happening while the key is in the start position? Engine cranking? At what speed? No crank? It doesn't take a lot of sitting for one or more batteries to take a dump.
For tensioner, pulling, alternators that have multiple manufacturors, you might find it best to hit FleetPride. They've always done ok by me. I then go to dealer.