I got the 2009 2.66GHz octo and was expecting a significant speed increase over my 2 yr old core duo Dell. For the work I do (primarily programing in Java), I did not notice a significant speed increase. And certain tasks like doc generation took about the same time.. Perhaps its because I'm new to macs, but the display on my 30" Dell monitor is really blurry compared to the windows display when connected to my Dell. I am using the same Dual DVI cable, and have ATI 4870 on my Mac Pro compared to my $75 NVidia card on my Dell . I tried turning off antialiasing as suggested here : http://www.macosxhints.com/article.php?story=20010605121335261 but that didn't help. Not a big fan of the mighty mouse too. I have the Mac AIR and really like it, and the display is nice and crisp. But I'm quite disappointed with the Mac Pro and even considering selling it having used it less than a week.