@Big E actually the Yosh is a little to quite, you can't really hear it if your in a cage unless your really getting on it. Brock's says the AH2 is a little quieter and I'll also add the the noise reduction plug.
I'd go with the AH2 and try it first before you buy that plug,i have the Short Meg and don't find it at all too loud.
Very nice! Man, those spokes on your rims look thin. I'd be afraid of twisting the hub right outa the wheel. What kind of wheels are those by the way?