Ive had my X-530's for nearly a year and there great, connected to my x-fi soundcard and with a few settings turned on it sounds great, my mp3s are crystal clear, the bass is very deep and it really does make songs sound a million times better when you can hear all the bass notes etc, as said they dont shake the room with bass, but there is ALOT of bass so dont worry about not hearing much bass because you will.
for the money you wont get any better than these.
Also rear speakers are the same size as the two fronts
for the money you wont get any better than these.
Also rear speakers are the same size as the two fronts