You guys are confusing the Pioneer models. I am talking about the D1...not the N2. (i think that's the models!) The D1 has the exact same double din full screen just like the Kenwood.
http://www.pioneerelectronics.com/pna/product/detail/0,,2076_3151_218219118,00.html
You will find it has two slots behind the screen...one for CD's just like the Kenwood, and another for the NAV DVD. It's a very clean installation and all the reports I've read rate the NAV system and DVD very high! The only two reasons I would shy away from the Kenwood is the price with NAV, and you have to find a spot to mount and wire the additional DVD drive. But your right...if I wasn't interested in NAV, I would be all over the Kenwood. It's a very nice unit.
By the way, the street price on the Pioneer is under a grand.