I am going to buy a PM this weekend to take advantage of tax free weekend. I already have a 17" Powerbook but wanted something with some some speed to do some video, photo stuff and of course other stuff. I plan on upgrading the RAM on the PM with cheaper aftermarket RAM. Dual 2.0 (with 1GB RAM, bluetooth, applecare) - $2196 (after company discount) Dual 2.3 (with 1GB RAM, bluetooth, applecare) - $2656 (after company discount) Dual 2.7 (with 1GB RAM, bluetooth, applecare) - $3116 (after company discount It's $460 to go from the Dual 2.0 to the Dual 2.3 and then another $460 to go to the Dual 2.7. So it's $920 to go from the Dual 2.0 to the Dual 2.7. Am I really going to notice the speed difference from say the 2.0 to 2.3? What about the 2.3 versus the 2.7? Then I have to ask myself what aboout the 2.0 to the 2.7? You figure there should be a huge speed difference from the 2.0 to the 2.7? Any comments/recommendations would be much appreciated.