I ordered some 40mm Marathon Supremes
Steve, sorry I missed a couple of your earlier posts. A few observations from my experience with Supremes:
1) I use 26 x 1.6 Supremes on my Raven. The nominal width of 1.6" (40.64 mm) is 39mm actual, inflated, so I take it from your comments on the wider tires and the TB, that you 700 x 40's fit and are comfortable. Good news!
I've had no puncture problems with my 1.6 Supremes (only 2 seasons' experience with them so far, however) and they offer good speed (within my limits and those of the bike), good grip and comfort, though I expect the 26 x 2.0 are even better in that respect. I have had some problems with sidewall cuts. One was serious, the second less so. Both were repairable, one with an emergency bodge. I wrote about that on the crazyguy thread on 26 x 1.6 Supremes, if you're interested:
https://www.crazyguyonabike.com/reviews/board/message/?o=tS&thread_id=350687&page=1&nested=0&v=322) Comments on the Thorn Forum of 700c Supremes have generally been positive, as I recall.
3) Not enough experience with my 700 x 35 Racers to get any punctures. I have read very positive reviews of Racers of different sizes from users here and on crazyguy.
Good luck in any case, John