I'd be more concerned about that rear blade damaging the asphalt...more so then the loader bucket (I've used both, but on gravel).
Your BX 1850 has about 14 PTO HP. That will limit you to a smaller PTO driven blower (48") which aren't too common used...but watch Craigslist for upstate NY, Vermont, New Hampshire...better yet, use Search Tempest (
SearchTempest Online Classifieds Search - All of craigslist, eBay & more in one search.).
Personally, I'd go for the 3PH blower and maybe add a Bxpanded plow (
Snowplows). The snow blower on the 3PH would provide adequate ballast for the plow...and you will need ballast using a plow.
I assume you have turf tires. They're pretty good in the snow (especially with rear ballast). Some guys are going to suggest chains. I have them, but I haven't used them in some pretty substantial snows here in Vermont. They can damage (scuff) your asphalt if you're not carefull. If you feel you must have chains, go for the two or four link ladder type....they're the easiest on pavement.