Is it worth the $500 difference? slightly faster CPU, 1GB SODIMM, larger video memory, larger hard drive. That's it as far as I can tell. I originally ordered the 1.83 (from Amazon) on 1/18 but my ship date is still 3/22. I ordered a 2.0 (again from Amazon) today (2/25) and the ship date is Monday (2/27). I plan to cancel my 1.83 when my 2.0 ships. The $500 is rough for me, but for peace of mind, I decided to pull the trigger.