I love my Dell Inspiron E1705 (period). It's large screen makes me happy. I take it everywhere. I even have an extra power cord at work.
I recently bought a Logitech mouse (thanks to the guy at OfficeMax that steered me in that direction). I love it!
I also bought some memory sticks (and a handy dandy case) to help take some of the pressure off my notebook so it can work at optimum speed.
So, yes, it's becoming an investment but it's worth it.