I listened to the TSI100s today and they sound amazing. I've heard that the old monitor 30s were replaced by the tsi series. What's the difference between the 2? Since I can get 2 monitor 30s for half of what i can get 2 tsi100s for on newegg, I want to make sure I'm not buying a bad speaker. Anyone have the tsi100s and monitor 30s or even the tsi200s and monitor 40s? what's the difference?