These are at parkers in nedlands and are running out the door at only 170 bucks. I have a set of the ones without the rachet system and after 18 months of use i only have great things to say about them. save the money on the sidis, get a set of these and spend the rest on "supplements" !!
http://www.exustar.com/sr221.htm
http://www.exustar.com/sr221.htm