I ride my LT with a Zumo and XM radio. With helmet speakers it was almost impossible to hear anything even on the loudest settings. I love to ride with ear plugs so I tried a pair of radio shack in ear spekres just to see. WOW what a difference. However they still don't block out enough of the road noise, nor do they stay in very well. Does anyone have any expierence with noise isolation earphones. I'm not looking to spend the $1,000 for Ultimate Ears but do believe this is the way to go.