I am very satisfied with the J&M Rokkers / XTs in the fairing / vented lowers, powered with the J&M Rokker 500w amp.
'Have the HK head unit with f/r pre amp outs, rear aux, and switched headphone jack by Iron Cross Audio.
Some of the reasons that I decided to go this route is that this setup is all plug and play, all wiring is included, sounds as good as any other that I have heard, and the customer service of J&M and Iron Cross Audio can't be beat.
"The Ball & Chain" says that she can hear the music crystal clear at 90+ and I don't even turn it all the way up!!
'Thought about the lids, but decided on the lowers instead. The lids look cool but take up room and it is better to have the speakers in front of you if you want sound at speed. I use the '09 SERG for long distance sport touring, if you are mostly local, then the lids are pimp.
Also the vented lowers and the '10 and later brackets were the final piece of the aero management puzzle for me, no buffeting, no ugly windshield, nothing but clean air at any speed ~ with or without a helmet!!
Purchased the J&M stuff from Eastern Performance Cycle, a J&M authorized reseller, great prices, great customer service.