I've got a Pioneer a model or so below that at the moment, it's a lovely unit but the jog dial isn't as nice to use as Sony's offering. Other than that though, it's a bit better in all other respects! Yours should be arse kicking.
Also you might find your ISO block from your previous one carries straight across? I used to know about the wires and plugs and then forgot it all, I've asked knighty to change my head units over the last couple of times I've needed it doing
I did get electrocuted hacking out the old aerial from the BMW for my Skoda, that was fun