I would maybe go with the S55 or S60 if your budget allows. Definitely the S30 over the S35. While the S35 has more drivers, they're only 3" each - I have read people describing the sound as being "thin", especially for male voices. As long as you don't crank the volume, the X1600H should be okay to drive those tower speakers. It might help if you included a sub, that way you can take some of the load off of the towers, and let the sub handle a lot of the grunt work. It will allow you to play at a slightly higher volume, too since the towers won't draw as much power if they were set to large/full band.