Which of these CPUs in the same price range will be fastest in SolidWorks 2012/2013 ?

1. INTEL CORE I7 3930K 6-CORE 3.20GHZ 12MB

2. INTEL XEON E5-1650 6-CORE 3.20GHZ 12MB

3. INTEL XEON E5-2630 6-CORE 2.3GHZ 15MB

I personally likes much cache but maybe higher clockratio is better somehow?

I will use it together with a AMD FirePro W5000 card(already bought that)

Was thinking about this mainboard:

INTEL DESKTOP BOARD DX79TO X79 S-2011 ATX

any input?