Thanks Bizzybear and Chris for clearing up the sharkfin antenna is for AM/FM/Navi
I guess since I'll be getting my windows tinted, the add-on xm antenna won't be too noticeable from the outside.
I did a short highway test drive earlier. Wind/road noise were not too bad.
Also thought the stereo was decent. Could use some more midrange, and the subwoofer isn't that impressive. The bluetooth was usable but not optimal.
USB stereo using a 1GB thumbdrive was cool, liked that.