I have the D-Wolf (
http://d.wolf.kit.googlepages.com/) (you can also google d-wolf, the first link that comes up are reviews on NASIOC) clutch kit in my car and for something so simple and easy to put in it is really really great. It is made specifically for Subaru and it eliminates some of the slop at the bottom of the clutch stroke and makes it feel as though the clutch engages lower. The clutch "switch" is adjustable so if you install one of these you can easily adjust the clutch switch to still function as normal, or you can bypass it all together so that you don't have to engage the clutch to start the car.
Ryan