Mark,
I have a Poli pigeon Gun with 32" barrels, Briley chokes, Palm Swell and single trigger. I don't know what you could do to improve that combination. I also have a Model 21 with 30" barrels that handles very similarly and would do the job as well.
Don't beleive that you can get an RBL Sporting Clays 12 ga. anymore. Production run is over, I believe.