Boston area 6/4 players...

[Getzeng50s]

Hey guys and gals,
I am starting to get really interested at the idea of purchasing a 6/4 tuba. I was hoping to toot around on some of the bigger horns in the area and get a feel for the different makes and models.. any fellow tubenetters willing to let me play on their horn a couple times anytime soon?
thanks..
Mike