The starmate is nice. I have had several different units (I retail Sirius) and from all the ones I have used, I actually prefer the larger units like the audiovox pnp generation 3 unit. The screen is much larger, and more info is displayed for you to see at all times. You get song title, artist, channel name and number, reception status and preset band all at one time, whereas with the smaller units you get either name or artist, and maybe something else uf you're lucky.
I know it takes up more space, but its nice to have all the info plus this unit allows for you to save up to 20 songs in the song seek feature, where the unit will alert you when those songs come on on any station. Unfortunately, the pnp3 has been discontinued though, and the sircmb5 is being released in january, but I am not fond of the new design.