I have a 6' loader mounted curtis blade and a 5' snow blower for my 30hp tractor. I also have a 7' box blade on the bigger tractor. I have only ever used the curtis blade one year and same with the snow blower. The snow blower we keep for if we ever get dumped on heavy real bad but that hasn't been a problem recently. I use the 7' box blade on the bigger tractor for everything, I can push with it and I can also back up to spots and pull snow away from an area easily. I can drag snow easily to a spot where I want to dump it and really clean up the driveway easily. I just pull up to where I want the snow, lift the box, back over the snow pile and use the loader on that tractor to push it forward off the edge of the road there.
The Curtis blade was nice and if my choice was either that blade of a rear blade I would, well I would put both on but if I only had one I would go with the front blade so I am not having to look behind me as much.
I am about to put the Curtis blade on the small tractor again anyway as I am taking it to my grandfathers place for him to use this winter. I will see if he wants to put the rear blade on it as well.