Asus p8z68-v le vs asus p8z68-v

Major difference is that the V version is much better overclocker!!!

ASUS Digital Power Design :
16 (12+4)Phase Power Design vs. 6 (4 +2)Phase Power Design

+ it has Bluetooth v2.1 + EDR ,eSATA 3Gb/s + 2 USB2extra

+ Quad USB 3.0/SATA 6Gb/s Support - Double Access, Double Convenience

+ Quad-GPU SLI and Quad-GPU CrossFireX Support!
The Asus V version is $37 more but you have much more in the way of options with this board and if you have intentions of having two video cards at any point in time then you would have to choose the V version or go with another brand that has two x16 slots for running two video cards.
If you don't care about the two slots and you just want to save some money then you could go with the V-Le version. You would have to decide what you need in the motherboard and what you will actually use.