I ALWAYS look for fit over brand, next in line is quality--in manufacture, but also wood and engraving, and finally in type. By type I mean for example that I have a tendency to crossfire by subconsciously looking at the larger side profile of an O/U as compared to the single barrel profile looking over the top. Not all the time, but it frequents my mystery misses. Therefore I must have a true single barrel profile as in an autoloader, or, as gets rarer these days, a SXS (which I LOVE and shoot well). As for fit, I am a fairly "heads up" shooter so NONE of the newer, straighter stocked guns are going to please me unless they have a super high competition ventilated rib, or are set up Italian style to shoot high, "floating" the bird, which are not my preferred choices. Older, well made, pre-war guns with their old school drop at heel are just MY cup of tea, and of course even then the quality of fit is individual and subjective. Most of the things I have mentioned (much less wood/engraving preferences) are NOT things other people can decide for YOU. So I would say, take all suggestions with a grain of salt. And I am only talking doves, not sporting clays.
Having said that, I WOULD suggest reloading options which can revolutionize both your effectiveness at shooting as well as comfort/flinch control. Bob Brister had to investigate this when he got a detached retina and could not even consider shooting magnum loads. The result was "killer bee" loads, developed by BPI. They are FAST--thus reducing lead requirements, and best of all, super low recoil. Since you were inquiring about dove guns, I offer them as the dove load solution. (Average killer bee is for a 12 ga, about 3/4 oz at 1500 fps) Over the decade or so I have shot them, my average on doves has consistently gone up by at least one less shot required per dove, and it may be even more at times. I know I could shoot them all day in Argentina without ill effects, but how to get them down there with me I know not.
Good luck