Dude you sound like the ideal candidate for the N900 ! Get this phone as no other phone on the market compares.

Have fun with it !

But one suggestion But honestly if I were you I will buy it second hand from some other disappointed user in AU or overseas to save a bunch - If you are going to use the N900 to its "fullest", I assume you WILL be overclocking, and this voids the warranty anyway so you might as well not pay for the warranty.