Since this thread has turned into a tire debate, I'll put in this bit for the Soma B-line. While I own three sets of Hetres for three bikes and like them a lot, I have heard nothing but positive feedback for the Soma B-lines, which are rebranded Panaracers Paselas in 650 x 38B size. In particular, the "skinwall" version (not the hypertex version also offered) has been compared very favorably with the Hetre for its smooth ride and low rolling resistance, yet it costs only about $45, or about 2/3 that of a Hetre.