Good Afternoon Bill,
I dont own any tractors with an 8 speed but I did help out the farmer down the road last week. I raked about 25 acres with his John Deere 1530 which IMO was a very nice utility tractor with 45 pto hp, and did most everything with that tractor in 5 th gear. I was using a John Deere 898 I think ground driven unit and 5th gear was the ticket. So in my very limited experience, 8 gears are a nice transmission choice IMO !
BTW that tractor has a nice low stance and seemed quite stable on some of the side hills I had to do !