I can only relate my previous experience when looking for an HU for the wife's Santa Fe. I looked at the Pioneer and that was top of my list until I went and actually tried one. Personally I didn't like the interface and felt it was a little laggy. Better than the Kenwood, but not that great.
I ended up getting her the Clarion NX501E. Excellent unit, with the most modern interface of all the units, much like the Iphone's. Nav works a treat with traffic, etc. Much better than my RNS 510 tbh. Bluetooth, DVD all in one package. But if you go for one of these, you will need a double din adapter.
Not sure if that's been a help or not, but my recommendation would be to get down to a decent Car sound place and test drive one of the units on display.