felt q720 with 120 mm?

[Oswaldo1976]

Dear friends:
i have a felt q720 2010 hardtail and i would like to change the original fork of the bike (an entry level dart 2, 100 mm) for one 120 mm fork, in order to do a little more agressive trail.
1- Is that a good idea?
2- if i do it, wich fork would be the right for that bike?

Thanks friends.

[BurnNotice]

I put a Marzocchi Bomber 44 TST2 on my Q720 and it is great. 140mm travel however.