Looking for a new pair of boots, need to be waterproof, comfortable, not some huge army surplus boot,  but a really comfortable, semi-flexible boot.  Would like them to have a removable liner but not absolutely necessary.  The last boots I bought were made by Columbia, they are great for being agile enough to jump around on the running boards. They just aren't tall enough to keep that snow out, that has a tendency to get in when digging sleds out of waist deep powder, and they are hard to get dryed out overnight on a boot dryer when on week long trips.  I know that there are a bunch of avid snowmobilers on here, just wondering which ones you have found to be the best.  Thanks, Tom.