I just recently traded in my Super Nova with pistol grip for a SBEII that I could duck hunt with. It shot really well with a Jellyhead choke and the new Hevi-shot Magnum Blend.
I used an 870 for years and still own it. The biggest difference was weight. I have owned that thing about 20 years. It is by far one of the most rugged guns you could ever own.
If it's a dedicated turkey gun you are looking for I would get the 'Nelli with the pistol grip.