ASRock A75 Pro4-M or Asrock B75 Pro3-M?

[hexaGAWN]

I used the A75 Pro4-M in my current build, but I'm building another for a friend. I'm not sure if I should go with the same board, or use the B75 Pro3-M this time. It's hard to find any reviews on either of these boards.

I like the PCIE spacing on the A75 board, but I'd also like to try the i5-2500K.
Any opinions?

 

[fireberd]

I recently built two PC's, one with a gigabyte M/B Z77X UD5H and another with an AS Rock Z77 Professional. The gigabyte has an i7 3700. The AS Rock has an I5 3550. Both zing along and except the gigabyte system has an SSD and the AS Rock has a hard drive I can't tell much difference. I'm using the gigabyte system in my recording studio and the ASRock is my "everyday" PC.