I'm not sure what options the RB1 offers but i know i loved my Pioneer AVIC Z1 when i had it as it had a ton of accessories you could add to it. It came with with a 30gb hard drive and i upgraded to a 60gb. I had an add-on HD radio module, a blue tooth module, an iPod module and a Siruis module and everything was plug and play and get worked great together. It had a 7 inch screen and i liked that. The only thing it didn't have that the newer models have is a USB ports or SD card slot. But then all the newer models come with smaller screens now unless you really fork out the cash for the top end models.