Suntour Cyclone is my favorite on looks and performance, but I'm quickly learning to love semi modern 105. The version that is pearl silver, and has dual pivot calipers. The FD/RD I just put on my peugeot shifts as nicely as the Cyclone M-II on my Trek! I have never found a bad performing Suntour derailleur, though. Make sure the cable has unhindered movement, and they're good to go.,,,,BD