I have very limited experience about this, but on the plus side I am a recent starter on shotguns, along with a couple of others in my family. I also have a friends who works on a shotgun range all day, every day who helped out with some advice.
I firstly made the classic (semi) mistake and and bought a cheap second hand shotgun and had a go. Funnily enough, I really couldn't hit much with it. I've since found out thats nothing to do with the shotgun, just that it was the wrong fit for me. As it happens, it fits someone else in my family, so not a complete disaster.
I stopped in at an Shotgun RFD who kindly told me there was not point fitting me for a shotgun, until I had done some shooting.
Then we went and had a few group lessons, where adjustable stock risers were attached etc. Also looked at things like stock length (I am tall). This was all very helpful.
The general advice I have had about shotguns was as follows:
-Very expensive ones just have prettier stocks etc
-A very cheap shotgun that fits can still do the job perfectly
In the end, I was advised to look at Browning/Beretta as they have long term reliability. But my actual choice was based on an instructor trying some shotguns on me and saying 'this model and make in 30" will fit you properly'. So I went and got a second hand one of those from an RFD, having got some advice in advance on how to check the shotgun was good.
So to reply to your original question, my view is now that a) the answer is specific to you and b) you are only going to find out after you have shot a bit and then get a fitting.
Hope you have fun with the new hobby.