I love the new trackpad, I have had my Aluminum Macbook for a little over a week and it was weird to get used to at first but once you do its amazing.
As far as the pressure required to press the touchpad down and the noise, if you flip the laptop over and remove the battery cover and battery there is a little screw that you can mess with that will adjust the pressure needed to click down on the trackpad
I just wish I had more time to use OSX, I have to run XP because most of my engineering software requires it.