I have been playing my first uke for a while now, a Kala KA-S. It is a very decent starter uke, but I know now that I would probably rather have a concert size, because I like finger picking. Because of the picking, I want an instrument that has better sustain and note definition and articulation than the regular Kala mahogany series. I am looking at the exotic mahogany series, and the mahogany with spruce top (KA-SC). For those who may know, which of these will have the best sustain and articulation in this price range? Please, don't insult me by telling me I need a K brand. I don't have that kind of money! I am looking at under $200 for a concert.