I am glad to see a thread on the F series! I had only dreamed of owning such a machine, when I found one by "accident" on the local Craigslist.
It was a F3060 with a Curtis Cab and a 72" side discharge deck advertised for $4400 with 1100 hours. I left work and stopped on the way to pick up my trailer and some cash. Luckily momma was at work, so I could ask forgiveness instead of permission!
I did end up doing some rust repair and painting on the cab, and added LED work lights for night work.
This machine really eats up the grass. I mow 3 acres with it, and my only complaint is that it does not turn very tightly when ringing a tree. My other machine is a Lastec 421D zero turn with 84" articulated deck, so maybe I am a bit spoiled.
Mostly, I bought my F3060 for snow. I have used my little B6200 with a rear blower for at least 10 years now, and I was sick of blowing in reverse and coming inside covered in snow. I found a L2052-1 snow blower on the local CL and figured I could make it work (it had the necessary reduction box and front mount reciever). It is a bit bigger snowblower that Kubota calls for, but it works great in all but the heaviest of snow where it could use another couple of horsepower... my excuse to find a F3680 I suppose.
I added front tire chains and some more rear weight, as well as adjusting the lift springs and things really worked well.
The Curtis cab is not my favorite, but being out of the wind and having a little heat made me a happy guy.