How many miles do you have on the 2010 stock mufflers?
The reason I ask is that my '09 stockers got a bit louder around 5,000 miles and then a bit deeper around 9,000 miles.
On my last bike 2006 FLHT (long story) I had drilled the stock 2006 Catalyst mufflers with a 1" drill and removed the catalyst from both.
They actually did sound pretty neat , but had an "odd" tone to them , kinda like small straight through baffles.
I saw a neat setup which has a satisfaction guarantee that I'm thinking of if I were to go louder.
Here's a link.
http://www.americancustom.com/
Even the quietest setup has to be a tad louder than stock with these.
Stock look , and custom tunable sound , for a decent price.
Pretty neat setup.
Mick