You cannot go wrong with the AT!!
The first 2 year's models had mainly some front suspension issues, but after that - Bulletproof!!!
The Adv Sport came with the "face-lift" and various improvements like:
1. Suspension as hinted
2. Improved Engine response
3. Improved foot pegs - front and rear
4. Improved speedo cluster
5. More riding modes
6. ...and of course the larger fuel tank
Show us pictures when you have it please...
