I test drove the XRS Matrix with the 6-speed manual and let me say it don't have much pull to it, also the 6-speed gearbox is mounted at a wired location like the Si and it sucks at shifting, I really don't like it. I've driven the Celica 6-speed and it shift way better than the Matrix....
Also the interior looks very American to me, and very un-Toyota like, the radio, intrument cluster, door, etc.
I choose my P5 for the following: Looks really cool, handles really good, kicks Matrix's butt (well the regular ones anyway) and it's cheaper.
One of my friend bought the auto version of XRS later and he raced my P5 once..... what a joke....
But I do have to say I won't stand a chance with 6-speed XRS they are little better in hp...