OK, I'll be the guy to post the dissenting opinion. Please bear with me...
Buy once, cry once.
You seem like a guy who keeps his equipment a long time. That means you keep it from one stage of your life to the next. This is an extremely important consideration. We, as humans, degrade over time. We get to the point where we take less and less BS from everything, including our equipment.
Backing up with a snowblower eventually gets old. I watched my father "age out" from backup snowblowing - that's why I built him a really nice cabbed B-series tractor with front-mounted blower and rear-mounted box scraper. With this equipment, and in his 80's, he could once again look after his long laneway.
Yes, it costs a bunch more cash to buy and install a font-mounted blower. Spend the money, and never look back (pun intended).
In my avatar you'll see my old B2410 with a front-mounted blower - that was my last open-station tractor. I now operate a pair of B7510's with front-mounted blowers and rear mounted box scrapers. After many years of moving snow in a part of the world that gets REAL winter, I can't think of a better combination for use with a compact tractor.
Parenthetically, the B2410 in my avatar came (used) with the front-mounted blower. My four previous tractors all had rear-mounted blowers. After switching to the front-mount I no longer experienced neck and shoulder pain. Lesson learned.