I usually do my initial shaping with a bandsaw, followed by patternmaker's rasps, spokeshaves, and vixxen files.
I like the Brian Boggs spokeshaves a lot, and although they excel at taking fine cuts in dried hardwoods, I find their throats are adjusted so fine that they clog when shaping green wood (not an issue in instrument making); I use home-made open-throated spokeshaves in greenwood chairmaking, but the Boggs 'shaves are fantastic once the moisture content declines.
I use Flat-soles spokeshaves the most, and use convex curved-sole 'shaves far less often - but when you need one, nothing else will do. I haven't used the Boggs concave 'shave, and don't anticipate buying one, but I'll keep an eye out for students using 'em at school and see how they feel in use.