Hmm, I've been using a Latitude for a while, too. :o) actually I am typing this post on an E6400-- my everyday PC at work. Its performance, reliability and durability are really impressive. I just love it! It makes large-scaled number crunching jobs seem like a breeze (I do a lot of these everyday), and I never have to baby it, basically just throwing it around--it's a company computer so why not :o) That's why I want to buy one of these Latitude for home use.
To me the only gripes are 1) weak speakers and 2)somewhat unnatural colors on the LCD screen. I have an external USB DAC/Soundcard + a decent headphone, so the speaker problem is solved. For the screen, I'll probably upgrade it to the best available option.
Thanks again for yorur help and suggestions!