How about a suggestion? A desktop and netbook, if you don't have any. A $200 netbook for the dissert, $600 for the desktop (or upgrades to your current), plus $200 for accessories.
I mobile with a netbook and nook color, but I don't do any computationally intensive tasks. Mostly note taking, web research & email.
I recently left my netbook somewhere while shopping. Netbook, $200 + $300 of other. I'm already >$1300 on replacement + upgrades.
(I wanted the Acer Aspire One, but it sold out, so I got a pink Asus EEE.)
I've got over 30 years experience with computers, 10+ years helping people off and on, and no real familiarity with the latest and greatest; feel free to PM me with anything specific.
Only laptop specific suggestion I can offer is, these threads likely crop up often, and on many forums. If you've only read what folks here have to say, you've likely overlooked a lot of information available.