It might just be the pad disc combination I have on mine. The important thing is shes not slim but does stop pretty well.
I hope other have some views on the other options you have.
I have the Ferodo DS2500 in my Brembos and find them to be very good although they wine like a ****** in slow traffic road braking in summer temps especially.
Thats what I like to hear! (says the man with an auto too)
This might be some good reading to start you off.
http://uk.subaruownersclub.com/forums/topic/15359-legacy-buying-guide/
Id like to think of it as a 100BHP NOS Shot. Least that what it should be. But Im gonna go with Gambits explanation, less exciting as it is.
Welcome . I hope you are enjoying your new Legacy.