I've used Conti DW's for the past 3 years and I won't buy anything else. They are the perfect all-season option....provide great grip, a firm (but not harsh ride), and they aren't priced too badly either.
Delivered! --> '15 F33 328xi, 8SA, Glacier Silver with Coral, 403M-19", ZMM, ZPP, ZTP, ZDA, ZDB, ZCW, ZDH, 4M5
Past --> '13 F30 328i, 8SA, EBII, ZMM, ZPP, ZTP, ZLP, ZDA, ZCW, ZDH, BMS Stage 1
Past ------> '08 E92 335xi, 6MT, DGM w SDL, ZPP, ZTP, ZLP