So lets say I wanna get a few new computers to work at home. Is the i5 a good upgrade from a Pentium D? Working with autocad and lots of adobe pdf generations etc etc. Is the difference from the tripple channel of i7 to i5 so noticeable? Any suggestions would be great. I'm in the USA, so if you could please suggest purchase locations based here, I would greatly appreciate it. Thanks
One thing I forgot, the memory for the i5, can it be DDR3 1600 (PC3 12800) ??