IMO the warmer Vail pairs well with akg 7 series. You cant go wrong with either, but the vali has a warm signature that adds a bit of immersion.
I wouldn't say the vali is better, but I think it pairs with the akgs better. Some would actually consider the magi a better all around amp. The vali has some limitations with more sensitive cans, and absolutely wont work with IEMS. However it is a hybrid tube design that adds some warmth to the akgs.
I use the mixamp>vali>akg k702.65ae's for console gaming, and they rock.
Edited by davisman - 12/19/13 at 6:26pm