so just get a h77? and xeon is equal 2 i7 a fx isn't even at a i5
a xeon is the same speed as a i7 3770, just without graphics and will run way cooler.
a fx is around the same speed as a i7 in workstation tasks, but the advantage is that it can overclock. the disadvantage is that it will run hotter and will use 2x as much power as a xeon. just a heads up.