I'm going to second the recommendation for Hincapie. I'm not quite as thin as above (6'4" at 200lbs) but the Hincapie bibs have the longest straps I've found, relative to the waist size (I'm a 34, Hincapie large fit excellent). I tried Pearl Izumi, Castelli, Specialized, Mavic, Performance house brand, Nalini, and Capo. Some of the Capo bibs I also found to fit well, but some have very short straps so those can vary.