Any suggestions on stereo upgrades for the Roadster? The stereo is just not loud or crisp enough when flying down the highway at 80 mph with the top down.

I'd like a new head unit, preferably something that matches color wise... is there anything like that? I don't know if I want to get one with a screen yet... depends on if I go with a backup camera or not. I will probably get satellite and plug in my mp3 player but every decent aftermarket head unit allows that now.

Also, speaker suggestions? Something loud and with some bass? Is there anywhere we can squeeze a small sub in? Other than the truck whose little space is already precious to me.