Gallery 2 vs Gallery 3 for Windows server

Hi there

I'm planning on installing a production server version of Gallery, but I'm not sure if I should go for version 2 (which is officially supported for Windows), or version 3?

Currently I have managed to get v3 to work on windows and it seems stable, but I'm just wondering if V2 would be a better choice?

In terms of features and looking forward, would I be loosing out not going for V3?

Many thanks!