Well, my BMW F650GS has a dual plug one cylinder Rotax engine. The bike weighs around 400 lbs. and usually gets 70 mph. 100 mph on the expressway can happen and there is more, but it is geared for on and off road, so I would not expect that much more. So 650 could do it, but they have a 800 which would give good muscle and economy.
Yes, I agree, a three tier family would be nice.
I forget who posted it, but they said when they sell their Spyder, they would give it away for free . . . . . BUT, the buyer would have to pay MSRP for the add-ons and accessories. From what I have seen, 25k would be a bargain given what the average Spyder tourer has spent ( including shipping, tax, and installation ).
One thing that might get me to move to a new model is if BRP goes back to their "roots" and does an Off-Road Spyder - a Sport-ATV. I know the Spyder is their On-Road product, but if it can do expressways AND rough terrain - I will be drooling all over the showroom floor.
Tom