OK, I'll probably take some heat for not hanging Campy on this, but here are some pics of my new steed, Pokey (first one who gets the reference wins the respect of my generation. No fair using Google).
Merckx Corsa Extra frame in SLX, same component group used on the SuperTempo: 105 5600 series FD/RD, 50/34 Truvativ compact square taper crankset, Tektro R540 brakeset & R200 levers, 105 hubs laced to Velocity rims (thanks, BBM!), Pro3's, D-A DT shift levers and SR 38cm bars.
Did an A-B time test against my best times on the same training loop using the same componentry on other frames, and this is definitely faster. We all know it's the motor, but I guess sometimes you need to put the motor in the right chassis for optimum performance.
Also rode this on the BikeMS training ride this past Sunday out in rural VA- 54 hilly miles- and was able to keep up with the low end of the A riders. As far as I could tell, Pokey was the only Merckx and the only bike with DT shifters on the ride. Lotsa positive comments.
Anyhoodle, lovely ride, works great, nice addition to the stable. All I have to do is swap out the 12/25 for a 12/27 for the hill rides. Sweet.