Navigation System…Only a Single DVD/CD Drive!!??

[How Much!!]

I was looking at an 05 H2 with the navigation system today and I was surprised to learn that there is only a single DVD/CD drive. Thus, when using the navigation system you can’t play a CD and the other way around!

Thus, on long trips when you need your nav system, forget about playing CDs. What’s the deal with that?

Are there any good after market CD players/changer that will integrate tightly with this system so you can have the Nav DVD in and working all of the time, and still play CDs?