Well, I made the decision to go with the Road Tech Zumo 665 with XM because the H-D XM internal module
alone is
$500...

For only $135 more I got the 665 - with full nav, traffic, and weather - from Surdyke.com. There is a handlebar-mount H-D XM radio that is $250... but it you're going to have something on your handlebar anyway, I would rather it be a full GPS instead of just XM.
It was kind of a no brainer for me. Takes only a few seconds to pop it off and stash it in a saddlebag or in the TP when I'm leaving the bike. The 665 is a
much better value for the money than the internal XM module would have been. I will never go anywhere without the 665.
I also have XM in my Avalanche, so I got a multi-radio discount from XM on the whole XM/traffic/weather package for the 665. So it made a lot of sense for me.
