I've been thinking about building a cab that contains a 15" and two 8" drivers. While researching speaker specs, I came across the Eminence Kappa 15C and Alpha 8MR drivers. Does anyone have any experience with these models? Are they any good? The power handling is in the ballpark for my amp and the sensitivity ratings are 103db and 102db, respectively. They seem great on paper.......what about in real life?