Consensus seems to be that with a friction set up that any modern era rear derailleur is going to work pretty well and even the Suntour Honour will perform very reliably albeit with a little more weight and noise than something like it's shinier cousins like the Vx and Cyclone.

It would be the perfect choice for a rain bike.

You cannot go wrong with the classic DX / XT / LX models... have recently built up two bikes with mid nineties XT derailleurs (M739) and they work flawlessly and look great and consider that this comes from a guy who worships at the Suntour altar.

Looks to me like the M739 is selling for as much as it did when it was new so one could buy a new Deore for the same price or less (also a nice derailleur).



The Deore MT60 is also a great derailleur that you can probably get for much less.