No offense to people who have the Forza seats, but IMO those are absolute crap (just like any other T-frame seat out there)
Get a f/g shell seat.
Those are actually very comfy (better than any stock seat in any car I've ever had) and sitting in them for long stints is no problem what so ever.
You just need to adjust the angle so you're upper legs (just above the knee) are propperly supported (another good reason to get a seat with side mounts)
The only downside of these seats is getting in and out of the car (because of the higher side bolsters), but you'll get used to that fast enough
Oh... and don't order any of those seats unless you've actually sat in one.
Many different brands/types and sizes to choose from. Pick one that fits your size