I am an absolute fanatic about the 28 ga guns. I think I am back up to 10 in inventory (started to sell them off, but just kept finding more I had to have). Started of with a browning 525 sporting model, and progressed into a half dozen sxs models. I actually went so far as to have a custom sxs done up at ugartachea, but that was a bad experience from the factory (long story). Bought my first sxs, the CZ Ringneck , which has since been remodelled into the sharptail model. The original ringneck was a foolproof gun for me, responsible for likely a couple of hundred released roosters on the shooting grounds.
Living in the heart of pheasant country, I get to use my guns over released birds for eight months of the year, and the 28's perform over both pointers and flushers if you do your part! My current "go-to sxs model is the little Fausti Dea I picked up from our own Catnthehat many years ago. Just an absolute pleasure to pack in the field. This little gun has raised cain with a lot of the local sharptail population as well.
The down side of a 28, if there is one, is the cost of ammo. I couldnt afford to feed mine if I didnt reload. If you DO reload, the 3/4 oz load of shot and the miniscual load of powder are very economical. Winchester HS hulls last and last and last!