Do I need this expensive motherboard?

Solution
Having used both, the A is fine IMO unless you want the onboard wireless of the Pro. I do not consider the 2 extra ASMedia SATA ports worth anything, as I would add a card if I needed more than 6. The Intel LAN port is a slight plus but not for the money.
In my opinion when it comes down to cpu and mobo i try to get the best possible, i mean these are the components that last longer, its not like adding more ram or more hdd...
 
Having used both, the A is fine IMO unless you want the onboard wireless of the Pro. I do not consider the 2 extra ASMedia SATA ports worth anything, as I would add a card if I needed more than 6. The Intel LAN port is a slight plus but not for the money.
 
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Plus not Pro - two different animals, the Plus is a little better handling heat and OCing and has a couple extra SATA nand USB 3 ports - really just if the PLUS has anything you think you'll need