Check out the following url for "The Chesnut Brass Company" brass quintet.
http://www.chestnutbrass.com/site/brassmusic/
A really cool group that I had the privilage of hearing this summer in Springfield, OH. Played all sorts of period instruments (and period music) including over the shoulder saxhorns, cornopeans, keyed bugles, ophicleides, etc. It's a really funny sight watching a quintet play with their backs turned to the audiance as they play their over the shoulder saxhorns with the bells aimed at the audiance. Really unique tone qualities from all the different horns. Where else can ya hear all these different horns in one concert ?

.
Seth Moore