I have a Jensen MSR 3007 Sirius unit on the boat
and two XM units in each of my cars. The programming is very similar unless you like Howard Stern or a rabid NASCAR fan.
You can go online to each of their websites and listen to their programming to help you decide for yourself which programming you like better.
As far as hardware
goes, I don't think it makes much difference at all if you put the automotive hardware
on a boat. For a boat you just want to make sure it runs off 12VDC for efficiency reasons.
Getting a little side tracked, one thing about Jensen iPod suitable Sirius receivers is that the built in controller absolutely stinks compared to the iPods controller. Therefore I ended up using the AUX in port (1/8 stereo jack) on the front of the unit instead of the ipod connector which comes from the back. Also, you would think Jensen would have made the iPod connector have the ability to charge the iPod?...It can't! Buying
an iPod capable unit and the proprietary iPod/Jensen cable was a waste of money
. Just make sure the face or the back of the head
unit has an AUX IN port. It does not specifically need to say iPod compatible.