MSI P7N SLI(750i) VS Gigabyte P35 DS3P

Firstly ignore dual VGA setup....
Which motherboard is better?

I like the features in the DS3P better, more sata/usb ports, overall its a cooler and more efficient board due to the gigabyte 'Dynamic Energy Saver'. And has the better p35 chipset.

But which is the better overclocker? with an E8400 and a Zalman 9500.

Now considering dual VGA...
The DS3P has the 2nd PCIe slot at 4x, and P7N at 8x 2.0.
Now the MSI will run both VGAcards at 8x in SLI, but that wont be a bottleneck because its PCIe 2.0.

Have no idea how good is the DS3P in xFire.

SLI gives about 30% increase in power, how much does xFire give, I just know its more than SLI, don't know how much will having them in 4x effect it compared to SLI in 8x 2.0.


Lastly...
I have no idea right now weather I'll go dual VGA or not, and also if I do; will I go SLI or xFire.
Go going on that what would you guys recommend...

Thanks