Xeon is best if you do not overclock. Make sure you get the 1231 v3 and not the 1230. There is another difference too. If you plan to not have a graphics card then the i7 is your choice. The Xeon does not have integrated graphics or you could upgrade the Xeon to one with graphics like this one: http://pcpartpicker.com/part/intel-cpu-bx80646e31246v3