Downers Grove Yamaha (aka DGY) has recently picked up Aprilia. I had no idea until I visited the DGY booth at the Chicago IMS yesterday. I was wondering "hey, why's the Aprilia Lion on DGY's banner?" As I got closer to the booth, I saw a Tuono Factory sitting in front of their display. Went in and talked to one of the employees, says they just picked up Aprilia a few weeks ago. Asked if their service techs are getting trained & certified to work on Apes, got a hesitant yes. Guess we'll see.
I personally have no experience with the sales or service team at DGY, so I can't comment there. I've bought some Amsoil from their parts counter, and a lid from their accessories dept. That's it.