My 2007 Jetta has the standard RCD 300 head unit with single CD player.

What are my options for upgrading? Options like inbuilt GPS, DVD, reversing camera capability aren't essential for me but I'd like to know what the relative prices are to upgrade from my current head unit because if affordable the GPS would be useful.

My car already has an after market Parrot CK3000 hands free kit which works and I would like to keep if possible.

Thanks in advance