We've been looking at the Kala travel ukes. We've wondered about the spruce top with the mahogany back/sides. Our Makalas are made from agathis, which we've seen described as "poor man's mahogany". We've been very happy with the sound of our Makalas, so we thought that we would like a warm, mellow sounding mahogany. Our question is about the spruce top. We 've read on another thread that the top is the most important part as far as the tone is concerned, so what is the effect of having a spruce top with mahagany back and sides?