This is about all you are going to get....: http://www.chainreactioncycles.com/Models.aspx?ModelID=34973 it is 120mm and that is on the low end of travel you wanted but to go up to 160mm it will cost ya'! Is this one the best? NO and is it the worst? NO....Will it work for you? Probably. Is It better than what you have now? Maybe.
Why do you need more travel in the front anyway? That 100mm fork you have now is not meant for freeride or DH and if you are using this bike for that then you are asking for trouble with more than just the fork. Get a new fork and keep the old one as a back-up. Now have you considered the cost of switching them over? Can you do this yourself? Do you have the proper tools to do this correctly? Average cost to switch a fork- $60 and higher. If you want the best for cheap, it aint gonna' happen but you will get something that works for you and a whole 20mm isnt going to make that much of a difference anyway but it is only $. You would be better served by spending that $ on a better wheelset than the stock wheels Im sure you have now....do you have a spare wheelset?
