The Vaya and Fargo both ride great, but different.
I was comparing the Vaya and the LHT before I ever considered the Fargo. The vaya is significantly 'livelier' than the Fargo and was pretty much the bike I was looking for. I ended up riding the Fargo and Vaya back to back for hours before really deciding which one.
The reasons I went with the fargo:
1) My wife has a vaya and I am a stronger rider, so the disadvantage of me on 29 x 2.2 tires helps make up some difference.
2) I already have a road bike and a cross bike - the vaya overlapped a bit too much, the fargo added a long distance mountain bike to my collection.
3) I am not sure how to describe the ride on the fargo, it is either like a beach cruiser or a tractor. It is insanely comfortable but slow.
Biggest problem I have had with the fargo - It is huge! There is no rinko bag I have seen near big enough - especially with the touring racks.