Cal,
Back when I was racing, I used STI shifters but never preferred them. I'm selling my most recent CX bike for the money in spite of the fact I loved it. It was a single-production custom built frame made by John Waite of Alpine, CA. It was super stiff and the frame itself was built to be shifted in the rear gears only. No provision for a front shifter or derailleur as the cable guides and bosses weren't there. I ran it as a 1x7 shifting with my favorite shifter, the XT topmount thumbshifter from a mountain bike. It was a fantastic ride at about 20.5lbs. White Industries hubs laced to Mavic Open SUP rims. Full XT component group with regard to canti brakes, crankset and rear derailleur.
I'm not riding much these days but I will soon. My helmet got crushed in our move and I just haven't been able to buy a new one. Anyway, my main bike now is a vintage 1980s Miyata 600 with a full Suntour Superbe kit, Cyclone GT rear derailleur, American Classic 2nd gen hubs laced to Alex touring rims. It's finished off with leather handlebar wrap and a Brooks Conquest saddle. Velo Orange hammered aluminum fenders cover the tires. This bike I built to be a replacement for a car and it has performed very nicely. It is one of the nicest frames I've ever ridden.
I also have a Koga-Miyata (I prefer the high end Japanese steel to the Italian stuff) racing bike with a full Shimano 600 group and rare 600 downtube shifters. It's ugly but fits exactly as the commuter Miyata does with the same geometry and same size everything, built by me, for me. It's in storage... grr. And there are a pair of matching Specialized Stumpjumpers from 1996 for Bethanne and I. One is a two-speed with a kickback hub, the other will be a full-blown 14 or 21 speed.
After a few decades of riding all the exotic stuff, I've come to the point where I only want to ride good steel. It's nicer to work on as well. Keep your fingers crossed for me in my pursuit of having the VA pay for frame-building school this winter. Then you could have a hand built Phil Forrest frame.
Phil Forrest