Sorry to come back to an old topic, but in deciding between Yakima and Thule for a roof rack system, the choice seems to come down to square versus round crossbars. I'm leaning toward Yakima (can't say why exactly) but found one posting that suggested the square crossbars on Thule are more secure (particularly for kayaks, which I'll transport from time to time, though my main interest is in transporting bikes). Anyone else have an opinion on this (beyone what's already in the forums)? Thanks.