Don't feel like reading through all of this. Just going to put my opinion out there.
I personally shoot my shotguns as much as I do my rifles. My Steoger has seen many cases of ammo for sporting clay tournaments, or just the back yard clay thrower days at my buddies house.
Ok, so pumps suck for clays. I have seen people use them, and use them well at clay tournaments, but I just don't like them. To clunky, too much going on while trying to get ahead of a target. Just not my thing and I don't shoot clays with them well.
I actually have an STF 3000. The LOP is long, but you are a taller guy, so I would bet it fits you quite well. I paid $250 for it used. Things to note, the forearms are NOT fitted like a Citori. Don't be shocked if you find one and the wood doesn't quite line up, but then again, they are literally 1/3 the cost of a basic O/U Citori. The auto-eject can be annoying sometimes to keep track of your shells ( I grab mine out of the breach and toss them then instead of letting them fly out only to have to pick them up later and the auto-eject makes that a tad annoying). Also, the lock is not as smooth and precise as nicer O/U, but works. I like the vent rib barrel and feel it helps ALOT to get on/ahead of the target much quicker than something that is just a bead post. I run my STF with a set of improved cylinder chokes and shoot Winchester AA SSClay #7.5 shot for clay shoots. This combo works very well for me and my gun shooting clays. I recently went on a FL waterfowl hunt and used a modified and full choke combo with Winchester drylock #3 shot, and was impressed →we hit our limit the second day. It also gave us a chance to watch our patterns at a good distance shooting into the water and was very satisfied with it. All-in-all, hard to beat the value of one.
I will note the STF is not forgiving on recoil. It is not awful, but not near as comfortable as a semi-auto, especially compared to any Benelli with the Comfortec (whatever they call it) stock.
My next opinion. I have shot an 1100, and a Baretta semi-autos (cannot remember the model though) for clays. Both are great shooting shotguns, although the 1100 broke on the second to last clay shoot again (forend support failed and the metal pieces got wedged into the action locking it up, previously had to replace the O-ring on it once as it got old and split in two). The o-rings are super cheap and inevitable to happen, and the forend support was $12 and only took 10-15 to replace and appears to be a somewhat common failure after crap loads of rounds after looking around on the Google). Me personally, I just don't shoot them as well, although I still want add an Ethos to add to the collection one day.
If you want to borrow the STF 3000 some time, hollar at me. You can use it for a weekend to see if you like it.