I'm pretty much with Rooster. When I want to hear Monk, I want to hear him played by Monk. Doesn't sound quite right to me without his unique presence, with the exception of Eric Dolphy's "Epistrophy" from 'Last Date' (and Dolphy was also a unique presence, both he and Monk were not like the other kids). Strictly subjective, no objective value judgments intended. I know something like Waldron/Lacy playing Monk is probably technically superior to Monk himself, but it's tangibly different for me.