Wow! Thank you all very much for the info

So CADPlans heres the deal. I have my Cub 108 with a plow on it and it works wonderful. Had it out today to plow snow and it rocked! I had so much fun I ended up doing my neighbors driveways too
My interest in the Gravely is for mowing and snow blowing. The Cub is setup great with the plow and I can use it for pulling carts around the property for work. As for mowing I have a pretty steep backyard. I'm reading and you also commented that these tractors have a lower COG which would be nice. Plus the extra free weight in the rear over the tires should help a lot for traction. All this sounds great but I have to also be realistic that my mech skills are still limited. I'm proud of how far I've come so far but I'd hate to get something that is just way over my head. The 800 line seemed very much inline with the 108 I have in regards to tech. The Pro line seemed to line up more with the Cub Super line which I have not moved into yet. And the 23g world is WAY over my head. What are your thoughts on this? I also don't want to buy something that is not going to do what I need just because I have not learned how to fix it totally yet. Heck, that's why I made friends with smart folks like you and the others here!!! HAHAHA! So please, your thoughts?