A400 Xcel Sporting 30" here - trigger's ok-good for me.
The only shells it got finicky on were with a few of those high base Rio target loads; eats everything else.
First time it didn't reliably cycle was during a round sporting clays in the rain AFTER it had been used for an NSCA shoot. It had some 2.5k rounds in it and I had not yet cleaned the gas port, much less a real cleaning (beyond wiping down the inside of the receiver and whatnot.) I was running Federal Walmart 4-pack 3 dram shells.
KO system is meh; took be a bit to get used to it; other systems are better but it does okay.
As for color: There are quite a few A400 smurfs in socal, although there are a number of Xcels that have been re-anodized to another color (like black, below) or electroless nickel plated.
Usually like my 302/303s more for sporting, but the A400 is always on as a backup. Some days though, the A400 does get the primary slot. It's my do-all backup gun, my loaner gun, my intro to new shooters gun, my inclement weather gun, etc...and is almost always with me in the car when I'm at the range.