The Westons look really nifty...I hadn't known about them. I had considered an Overton, but I think I need a tunable whistle, since I have to blend nicely with Reynaud on concertina, fiddle, or hammered dulcimer. That's been difficult to do with my non-tunable whistles (Oak, Feadog, Generation). Consequently, I've been playing a Ralph Sweet D in wood and Susato C, G, and low D--I seem to be able to play them all in tune with whatever instrument Reynaud's playing. I play whistle occasionally in jam sessions, and occasionally with a larger ensemble, but mostly it's just me and Reynaud playing weddings, re-enactments, renaissance faires, and the like.
I've been thinking about a Copeland because I played a Copeland once, for about 15 seconds, and I loved the sound--it was a brass one--and I have heard a couple of other people I know play Copelands (also brass) and I like the sound of them too. I guess what I'd really like to do is hear how they all sound when *I* play them, and then pick the one I like the best....