The best experience for the participants (on and off the field) IMO is more important than geography.
And Terre Haute, IN fits that bill? 
Never been to the facility, but it's generally gotten good reviews and has undergone continual improvements. I have very little doubt in Coach Jenkins' ability to run a fine tournament. The only thing I don't know is the quality of the pre-tournament events for the players and the community support for the event. That's where I don't think you can beat Marietta. Marietta's also probably the best destination town of the places ever likely to be considered -- , but Marietta can't have it every year (I suppose, I don't know why not though because it seems like Whitewater does).
I think the Series should never have left Marietta, but since it did, I have to say Appleton is a great site and wouldn't want to see it move except back to Marietta (which isn't likely). In the same vein, if the regional can't or isn't at Marietta, I have no problem with Rose-Hulman as a choice.
If someone has an idea for a better site than these two, they should bid with and then we'll see if the powers that be agree. I will say I don't think Chillicothe is any more than Canton was. There is one place I'm very surprised has never been bid (or I assume hasn't) but I don't want to give anyone any ideas for somewhere to have it other than Marietta so I'll keep it to myself.
