I sure like my Winchester M1400 auto for dove, takes the sting out of a few days of good shooting. I recently went up to a friend's place opening day and we had three fantastic days of shooting. He and his son were complaining of sore shoulders, I was ready for another three days, LOL!
However, my gun is no longer made...
...sad, cause it's a really decent shotgun and was quite affordable. I gave $255 at Walmart for it about 20 years ago. The 870 is a fine dove gun and I can see nothing wrong with saving a few bucks and buying one. With a 3" chamber, if you ever wanna take on turkey or waterfowl with the gun, it gives you some versatility, too.
Yeah, I shoot modified on dove, normally. However, with interchangeable choke tubes, you can tailor to your shooting situation. I really prefer the knurled knob type Winchokes for choke tubes to the internal choke tubes, easier to change in the field when you decide they're coming in too close and you need an IC in the gun, but if you carry a dime, you don't need a wrench on your 12 ga Rem chokes.
If all you're ever going to hunt is dove and upland game, a Wingmaster is fine. However, I'd pick an Express with plastic stocks and matte finish, personally, because I do a lot of duck hunting in the salt marsh. That's rough on a Wingmaster. It'd look worse than the Express after a few years, I can tell you from experience. My shotguns are for HUNTING, not looking at.