If you want a radio with lots of features, try this one below. I believe you can also get a 100 watt and 200 watt version to save some $$$. I have it in my trailmaster and it screams. More than loud enough to hear with all of my mods and that's only half way turned up. Everyone that hears it asks me about it. Plays mp3s from an sd card or usb thumb drive and the am/fm tuner is amazing. I think I paid around 110 shipped when I bought mine. Bought one similar Len's, but it did not work worth a flip and you could barely hear it while riding.
http://www.amazon.com/Motorcycle-Sno...J79196B5V3VPDA