Well all of this being said it does make me wonder how the snow blower from Power Trac works. I think the one for the 425 is 48". Does anyone out there have one and what are your thoughts? Does the 425 have enough power to run blower?
KentT, do you think that with a 2 stage it would be easier to adjust your speed rather than the width of each pass to avoid clogging?
The Power Trac snowblower for the T-8 class is a 48" two-stage...
http://www.power-trac.com/images/Attachments/snowblower1.jpg
http://www.power-trac.com/t8attachments.htm
Since it is a two-stage, the PT will likely handle it OK. My comment about 45" being the upper limit was regarding a single-stage...
Two-stages are not nearly as prone to clog in wet, heavy snow as discussed in likely too much detail...

You could likely take a full cut, listen to the engine, and slow down when/if the engine starts to bog down... You're still limited to less than 10 PTO horsepower...
My concerns with this PT design would be:
1. The exposed drive chain leaves it exposed to grit, ice, salt, et.... not sure why they didn't put it outside the "hopper" and put a cover over it the way other manufacturers do...
2. The use of caster wheels instead of skid shoes. IMO, adjustable skid shoes would likely be much more reliable and hassle-free, especially if being used on gravel driveways. I can understand the need to be able to move side to side on an articulating maching, but unless these casters are FAR better quality than what's used on the mowers and other attachments, I'd still have some concerns...
3. Price -- at $3000, it should be a refined, well-constructed piece of equipment. Too steep for me...