I'm a fan of the 9x23 Winchester, factory 125gr ammo gives an honest 1450+fps by my chrono, that's .357mag velocity for the same weight projectile. Very flat shooting and hard hitting, louder and more muzzle blast than 9mm or Super but recoil isn't an issue. The 9x23 brass is beefed up to handle the pressures so, as I understand it, if you handload you can push further than you might with .38 Super brass.
When I had my ORM 1991A1 Super built several years ago I had the 'smith fit 9mm and 9x23 barrels to it. Each barrel has it's own fitted bushing, to change calibers you just swap barrels, bushings, and recoil springs. I use 9mm mags for 9mm, Super and 9x23 use the same mags. Easy peasy. Shooting 9x23 is a hoot and it's a great self defense round.