I've never tried chip carving, so please feel free to dismiss this as the ramblings of the supremely uninformed.
The thing I find with knives in general that makes the most difference is handle comfort. Most have adequate blades (as long as they're the right general shape for the purpose), but a handle that fits your hand nicely does seem to make control and pleasure of using that much better, especially for something you may be using for some hours at a time. Handles do seem to be very 'personal'.
With that in mind, maybe Andy's suggestion of visiting a seller and trying a few might be a very good idea if at all possible.