I currently have an empty 4x10 that I'm considering loading with the following: 2 10's rated at 200W RMS with a 2" voice-coil and 50 oz magnets, sensitivity 99db, stamped frame, xmax .25 - frequency range 65 - 7000 hz 2 10's rated at 250W RMS with a 3" voice-coil and 50 oz magnets, sensitivity 96 db, cast frame, xmax .25 - frequency range 50 - 4500 hz I have not decided if I'm going to add a tweeter driver or not to the cabinet yet (it currently doesn't have one). I know that the specs for the 250W speakers suggest they are better made (with the exception of the sensitivity). The reason I am considering using two different types of speakers is to cover a broader spectrum in the frequency range. I like my cabinets to have good note articulation and I know the treble frequencies add to how crisp the sound of the notes will be. Is all this a bad idea and should I just pick one type of speaker and load with all 4 the same? Or maybe, should I just change one of the drivers and leave the other three the same? If I make them all the same, I'm leaning toward the 250W speakers, but any input on this would be greatly appreciated.