I've got 2 brailles and without a doubt they have been the best battery I have put in a Motorcycle since I got my first bike in 2003.
I've torn up just about everything else in 1yr or less with both my Big Dog and my BMC. (Harley, Interstate, walmart specials, and a Lithium) - Haven't used the TR racing (Tomioka Racing, although from my limited checking, I'd bet they are actually relabled Braille units, don't think a small company with a mailing address of a UPS Store is really making batteies. But I can neither confirm or deny this)
Basically -- get whatever you can afford and see what works for you -- As you can tell from the thread, there is NO clear concise winner -- every brand out there you can probably find someone here who's gotten great results as well as someone who had miserable results.
The bottom line is - We need better battery technology! Someone needs to make a cold fusion reactor -- that's the ticket -- then we can skip the engine and just get a sound effects set for the riders that need their bike to "sound right" going down the road.