New forks for Giant Yukon FX

DandyLion24 Posts: 8
edited April 2010 in MTB buying advice

I just got a Giant Yukon FX 3 last month, and I'm having tons of fun on it, but with one eye on the future I was wondering about upgrading the forks.

It's currently got 100mm Rockshox Dart 2, which I appreciate aren't fantastic, but was thinking about the Manitou Drake or one of the Rockshox Toras.

Am I limited to other 100mm forks, or do I have any leeway in going up a size in travel, to 120mm?

I obviously don't want to change the geometry of the bike, but is there any give at all in this area?

Any help would be greatly appreciated.