I am planning a new XC build with 8 speed components but am not sure which shifters to get. Reliability is my main concern, and was my reason for wanting to use 8 speed components. Price also is a factor, so I would prefer to keep the cost of the shifters under $60 or so. Are the '07 SX5 sram shifters the same thing as '06 x.7? Thanks for the help!