Using grant22's great idea of the Fusion install in this thread http://www.rzrforums.net/lighting-stereo-electrical/33949-my-new-fusion-stereo.html
I decided to pretty much copy his install. I found the newer version of the Fusion head unit on ebay and was able to get it for $225 which I thought was a pretty good deal. It really pushes the two 6 inch speakers in the polaris pods. A lot louder than my last setup of just the amp straight to the iPod.
And another good thing I found out last night is that my iPhone 4 works great in the unit. It reads the album and artist lists and everything. I was very impressed with the final product. The darker features of the newer model looks awesome with the LE.