Do you prefer a mid mount mower? If so the
B2301/2601 have a drive over deck like my
B2620. I love that. The slightly bigger B50 series does not have drive over decks. I think they are a great tractor. If you get the
B2601 you'd have lots of power, great on fuel, and they offer optional two rear remotes and quick attach on the loader and third function. Get the big alternator too. Then you can add whatever lights you want with no worry.
I can't really say what implements you should get. Personally I use my fel and 60" box blade the most (besides the snow blower.) I bought a hydraulic angling rear blade and thought it would be really useful, but it just sits and I always put the box blade on to do any dirt work.
But for you, if you don't need a snow blower for your average snowfall, a rear blade might be good for you. And likely cheaper than the front quick attach FEL blade and third function the new B offers.
Shed......depends on how it's built.