I got an SL Frameset. Not a fan of 2x for this kind of bike. Too many chain drops and other problems in my experience when riding on New England single track!
Built it up 1x with a SRAM Force1 42-tooth crankset in the front, 11x42 XT cassette in the back and an Ultegra RX Di2 rear derailleur. Brakes are TRP Hylex RS with the Di2 shifter pod mod. Light Bicycle carbon rims on DT Swiss 240s hubs. 45mm WTB Riddler tires.
The bike looks pretty rad, and I love this parts mix, but I haven't ridden it yet. Will report back.
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FlashBazbo, may I ask how much you weigh and what size frame you're on? I'm on a 61cm @ 190 lbs. We'll see about the IsoSpeed flex...