Oh, so many good choices. I'd say it's a toss up between FC London on June 12 (come down for the USA-England viewing party and stay the day) and the Chicago Fire on July 10. Both will be great matches.
Bradd: This year's visit by the Outrage to Ultimate Soccer is Thursday, 6/24 @ 7:30 PM. AJBirch: You might also be interested in coming down & checking out some of the college talent the Bucks will be evaluating when they host their College Cup on Saturday, 3/27 at Ultimate, with 4 games being played amongst Michigan, Oakland U, Notre Dame & Akron starting at 12:00 PM. And, it's just $7 for a ticket to all 4 games (at least before 3/17, $12 if purchased between then and the time of the tournament).