The VX even with the comfort pack is loud. Having a conversation in it at speed is difficult/impossible.
When I first got my car I got a Blaupunkt SatNav and it was OK but I found that I was listening to the music louder and louder and then decided that the radio competing with the VX was making me go deaf!
I have an iPhone 5 with TomTom applicaion on it. I have double sided sucker whihc I put in front of the speedo and plug my ear buds and power cable in. Works great. Yes it is wired in (in needs power as it uses a lot of power with the SatNav) but if it is just you in the car its not a big hassle, just remeber to unplug when you get to the PFS!
Obvioulsy not so good if you have a passenger but most of my driving ((I've done over 160k in the VX) is by myself going to and from work. Leave the radio for when you have a passenger. The great thing with the TomTom App as it gets updated all the time.
My Blaupunkt Sat/Nav needed the CD with the maps on it replacing every few years at a cost of around £125! I got the TomTom App for my wifes iPod Touch years ago for about £30 and its been updated loads since. A rare bargain indeed.
Mark