Picked up the new bike (pic's soon) and everything is set except a cassette for the Zipp's. The training wheels have a 11-28 Shimano 105, but I'm thinking the Zipps would think a cassette like that would bring the neighborhood property values down. Not sure whether to go with Ultegra, D/A, or SRAM PG-1070. I have a D/A RD. Opinions?