Today I stopped in at LBS to check out the new Trek Checkpoint. The store didn't have one -- apparently, Trek can't make them fast enough. The sales guy showed me a Domane SL 6, with MSRP of $3500 but on sale for $3300. He suggested that for my needs (see below at *), the Domane would work well. It comes with 32mm tires that have no tread, but he said that I could swap out for tires in the 34-36 range with some tread.
* I already have a mountain bike (2011 Spec. Stumpjumper FSR Elite), and have put a lot of off-road miles on it. But for the past few years most of my riding has been on the Capital Crescent Trail and/or the C&O towpath (I live in the DC burbs). Last year I was even thinking of getting a road bike, but then got interested in gravel bikes.
I'd be grateful for any thoughts on these two questions:
1. What do you think of the Domane SL 6, with upgraded tires, for my purposes?
2. If you think this is the way for me to go, what tires would be a good match for my needs and this bike?