I will add my .02 and back up what some others are saying.

Suntour Mountech and Cyclone MKII both work. The Cyclone MKII is quickly becoming my all time favorite front derailleur, it just feels so nice to me when it shifts for some reason, I believe its fairly light, and it's very handsome.

Both derailleurs shifted the 24-39-50 triple on my Centurion ProTour very well. The Mountech has a pretty long and wide cage, which could have its benefits.

I have a Mountech with a 28.6.mm band I would sell, as well as a Cyclone MKII with the endless band, 26.8mm, that I would also sell, if you're interested