hi everyone, i decide to purchase a Mac Pro for my photographic use. because i don't have 5000 euros to spend, i am to going to buy a 2nd hand machine. i really hesitate between this two Mac 1. Year 2009 4,1 upgraded to 5,1 http://www.befr.ebay.be/itm/Apple-Mac-Pro-5-1-2009-6-Core-3-33-GHz-16GB-Ram-USB-3-0-R9-280X-3GB-/161740098537 2, Year Mid 2010 5,1 http://www.befr.ebay.be/itm/151759563413_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT my question is: the 2009 upgraded is stable as the original 5,1 version? it is also a professional use, the stability is very important to me. i have nearly bought it, because the spec est much better then the other. so which one to choose? thx!!!!!