I have a HD8 DPS with soft doors and a Boss 6ft straight blade plow. It works great, can push lots and lots of snow!
(I'm in central Wisconsin)
If did it over again however, I would buy the HD10 just because it gives you a good chuck more power(like 30 some). The HD8 with 50hp is enough but I'm a more power guy and would get HD10.
So if $$ is a concern you will be fine with the HD8, but if you have the extra $$ go with the HD10.
That's just my 2cents.