I would recommend you replace your amplifier rather than allotting that huge amount for the speakers only.

Sound Magus is over-rated. If it's output at 2ohms is at 190W, a good idea of its output in 4ohms is half of that -- which is 95W. Factor in that most of these measurements are taken at optimal electrical voltage of 14.4V, expect output to be around 80W at 13V levels ;)

If you're into loud and clear, go for the best na which is Beyma raw drivers! Take note that you'll also need a custom door modification for it to be properly housed. Brands you should look out for are Cadence, Beyma, RE, Sundown, DC Audio, DD..

If you'll alot around 20k for the speakers, go for raw drivers na. I like Cadence Neo's 8 incher and their CVLT35 tweet. Mga 18-19k I believe. Use the others for the door panel modification, deadening, and better amplifiers. I wouldn't mind the SM mono amplifier, but I'll recommend you replace your 4-channel SM.