I got quite a few responses but only a couple of people could reference Allstate and nobody had specific claim experience with them.
Thanks to all who responded. 
I called Progressive one more time to ensure I had the roadside assistance question clearly answered. Here is what I concluded:
I decided to stay with Progressive. Allstate's roadside assistance is limited to $100 maximum per occurancere whereas Progressive's is towing to the nearest repair facility regardless of distance and they also include up to one hour maximum for labor per disablement. Given my likelihood to break down in the boonies (especially if I were out west) and that labor rates typically exceed $70 per hour, the $70 annual difference in premium could get chewed up in one occurance. As a side note, I responded to a flyer from AARP touting discounts to members for motorcycle insurance from Foremost Insurance. On an apples to apples comparison, they came in at $671 versus the $345 for Allstate and the $415 for Progressive. I'm sure there are a lot of folks out they paying too much for their cycle coverage.
I am not posting the specific responses I received, but would urge members to use this forum to swap stories and compare notes on things such as this. One tip from a fellow member can more than cover your membership dues for multiple years and make us all smarter, better consumers. Because remember the old joke....."Whats the cheapest thing on a BMW?.........The rider." Take care. Anybody else, feel free to add to this thread.