Hi there! I'm currently trying to make the same decision! So far I'm swaying towards the Peacock. I mostly play trad folk, and on all the recordings I've heard, the Peacock seems to sound more like a traditional-reed concertina (it also looks a lot more like a vintage concertina). And Mr Wakker is a maker of traditional instruments after all. But the Beaumont's extra buttons would make for a lot more versatility. More usable range and much easier to play chromatically. And the larger overlap between hands especially; I expect that'd make it easier to play melody or harmony 'between hands', English-style. Also I seem to remember someone on here saying that the Beaumont has a slightly better fit-and-finish. MetroGnome, I suspect recordings don't do the instruments much justice, but that's all I have to go on too (I live in Scotland). Soloduetconcertina on youtube is a marvellous Beaumont player (a TAM-reed one I think), and Steven Arnston on Soundcloud plays the Peacock. You can also hear Morse and Wakker-hybrid instruments being 'demo-ed' on the Liberty Bellows youtube channel. (The videos are made by people who aren't concertinists, so the playing isn't anything much, but you can hear their tone).