Well, the obvious answer to this question on this blog is the XXIV Summer Colloquium of the Church Music Association of America, June 30-July 6, 2014.
Monument Circle. It's right around the corner from the Sheraton International City Centre! The Visit Indy website will give you everything from restaurants to walking and running trails, so check it out. Who would have thought that John Dillinger and James Whitcomb Riley were both Hoosiers?
And remember to register by June 4th for the Colloquium to avoid the late fee and make your hotel reservations by then to get the conference rate!