I know the Ultra Vac's are great. Not sure if they fit the 60 though. On the other hand, i have heard that early spring this upcoming year, exmark will be coming out with a bagger for the 60 AND the 72! Rumor only as far as i know though.
It's coming in January, and it's AWESOME! I know, January isn't very good timing, but it's worth the wait. I had the opportunity of testing the new system, and it's unbeatable. We were cutting wet, thick, overgrown weeds behind the dealers warehouse, at a pretty good clip, and it cleaned it right up. We were NOT able to clog the system though many of us tried. The bag setupo is really neat too, For ease of dumping, they even though of putting handles on the bottom of the bags. This unit , I believe is going to sell for around $1400.