I agree with Ray. I have a 470 William Douglass and sons and at 9.5 lbs the 470 is brisk. I shot a really nice Lancaster 450-400 and it was sweet.

I'd go to a DRSS shoot handle all the ones there, maybe go to SCI and fondel the ones there too.

My next double will be a FAMARS 450-400 with 25 inch tubes and really trim at 9lbs.

There are some damn good modern doubles out there Searcy, Evo- doubles out of Idaho, Chapuis, Demas,FAMARS, Heym, and Ferlach makers.

Fondel as many as you can and when you make your choice dont look back, shoot it and enjoy. Its a major investment, but there is no other gun that has as much nostalgia as a double.