I'm running Mirage 8-speed shifters and Daytona rear mech with a Shimano 8 speed cassette. Whilst not perfect, it's adequate. Intend to put a Shimano 7-speed cassette on at some point. But at the moment, it doesn't seem necessary. This CTC article has lots of useful information - http://www.ctc.org.uk/cyclists-libra...gears/shimergo