X2 I worked for a custom built shop for 10 years and wouldn't do it any other way. As a side note: We (my employer) have a brand new Imac 27" I3 and I installed an extra 4 gigs to bring it to 8 gigs, this is for a printing company, this pc is NOT 1 year old yet (new September 2010) and we have had to replace the hard drive AND the dvd drive, the glass on the montor HAS TO COME OFF TO WORK ON THESE THINGS. if you buy a MAC good LUCK, make sure you pay $179.99 for the extended warrantee.