I'm not convinced that having so many screens at the helm is a good thing in terms of attention to what's happening outside the boat, but then, I'm easily distracted and definitely have some attention deficit syndrome going. I'm very happy with my single screen raymarine display that puts depth, gps and radar on one screen all at the same time or by soft buttons, putting them on the screen one at a time. The boat pictured has a super clean installation as I look at the picture, and particularly the cabling, but I just looks too cluttered in the pix. I suspect that standing at the helm it isn't actually that cluttered. I'm a big fan of those CD "surround" windows and hate to block any of the view out of them.
I am a big fan of the old fashioned compass, and if you mount one, be sure to do only a temporary mount so you can see the possible effects of electronics and other electro magnetic or ferrite influences on the compass before you screw the thing down permanently.
One VHF bolted below the shelf should be plenty. The back up, in my opinion, should be a high quality waterproof hand held. I'm not tall, but tall enough that when at the helm, the second radio, seems to me, would be in my field of vision.
But, any arrangement that you are comfortable with is the key. There are as many different arrangements as there are C-Brats, and each will think theirs is the best. That is because, for them it is the best.
PLEASE, PLEASE, pay attention to nice clean cable layouts, penetrations an dressing.
You will love your 2007.