Pete, another thought, since you seem drifting toward Merkel, is to do a little looking for a ~ 50's vintage J.P. Sauer & Sohn built in Suhl, before they moved. There are ejector models without cocking indicators, that are very difficult to tell from Merkel, in looks, quality, and function, at VERY attractive prices. Some were imported and sold by Abochombe & Fitch, and there are some spectular examples out there.
Since, however, you've mentioned 20ga, put your name on the list for an RBL, and get yourself a shooter to use in the meantime.