My motobecane is a mix of 105, ultegra cassette and a truvativ elita crankset. Shifting is pretty smooth, and the cranks are strong like a rock.

My trek 1100 is a freakshow, suntour Edge 4050 components with a shimano IG70 casette, shimano 105 53t chainring, sugino 46t chainring, and hte stock on the small ring. Oh, and Sora hubs. The crankset has custom spacing as well, good thing the front shifter is friction.

For my mountain bike (off topic but oh well) it's DeoreLX with an XT rear deraileur and casette, and a truvativ stylo crankset. And WTB hubs.