[RickinMA]

I just started looking into getting a portable GPS unit for the car (not ready for a golf GPS yet) and there's a ton of different options but I haven't quite found what I'm looking for yet.

Does anyone know of a place where you can filter by options? For example, I'd want the GPS unit to also be a bluetooth hands-free speakerphone and I'd like to to play MP3s.

I think I know what I'm looking for, i'm just not sure it exists yet - I'd like:
>bluetooth functionality
>plays mp3's
>XM radio ready
>accepts SD Cards
>some harddrive capacity to store pictures, etc while travelling (transfer from SD cards from camera, etc)
>small size that would travel nicely

any thoughts?
I looked briefly at the tomtom go 910 and the garmin zumo 550, but neither does all I'm looking for