I have small budget to buy a used Mac Pro. My long time running 2x3ghz 1,1 is doing fine, but I could use a bit more speed (I primarily use CS6 Illustrator). This weekend I could buy either a 2,1 8 Core 3.0 or any number of 2009 4 Core 2.66's off of craigslist. I can invest another $300 beyond the purchase price for upgrades... but which is the best course of action? Geek bench speeds are pretty close. Just so you know, I've been on a Mac daily since late 1986, and prefer stripped down fast running machines. No interest in bells and whistles, its all about speed and doing a lot of work fast. I'm 65% Illustrator and 35% Photoshop.