Thanks, everyone, for these inspiring ideas. I’ve not managed to track down anything by David Kechley yet, and Duo Montagnard is a good lead: I’m working my way through listening to their various CDs. I play Villa Lobos a lot so the Bachianas Brasileiras is a great idea. My son plays a lot of jazz ... but I fear that would be way out of my comfort zone! There’s plenty for me to work on here — so I’d better get to work. Great suggestions, thanks.