If you are using your iPod with a transmitter then you can get all the power out of the stock head unit. Once you have it setup. Turn the radio all the way up and adjust the volume at the iPod. It should get plenty loud for you.
You know what? You're exactly right:
I don't have an iPod yet, my wife does, and we tested hers the first time this weekend. When I had the Track amp cranked to full and the top open, it wasn't enough. But then she turned the iPod up and it was fine. Unfortunately, she was at the iPod controls, so I myself didn't get to play with it VERY loud.
THANKS FOR REMINDING ME!!!
The only issue I had, and maybe it was a weak battery in the transmitter, was that it was a little static-y. She was in the passenger seat and the antenna is driver-side, but is the antenna for both AM and FM anyway, or just AM?
I ask because since I plan to strap the iPod to the sunvisor--perfect place to make song selections while driving--maybe this will be an additional fix, getting it closer to that antenna.