<< Actually, that's not true. the Klipsch measure their power rating based on the burst rating, not RMS. The 4.1 systems were rated RMS but the new 5.1 uses Burst like the Megaworks. >>
That couldn't be more wrong. Here's how the Klipsch speakers are rated:
The Klipsch 2.1 wattages are calculated like this: 6.5" subwoofer-130 watts; (2) 3" satellites-35 watts each; Total system power=200 watts
The Klipsch 4.1: Dual 6.5" subwoofer-260 watts; (4) 3" satellites-35 watts each; Total system power=400 watts
The Klipsch 5.1: Dual 8" subwoofer-325 watts; (5) 3" satellites-35 watts each; Total system power=500 watts
How do you figure that if the Klipsch 4.1's are rated by using RMS, that the 5.1's aren't? All that the 5.1's add to the 4.1's are one more satellite, and 23% larger subwoofer drivers. This clearly shows how the 100 watt gain is achieved over the 4.1's.
I own the Klipsch 2.1's I couldn't be happier. If I had to do it all over again, though, I would buy the 4.1's, because they aren't so anemic when it comes the low end frequencies. Overall though, I think the Klipsch really have it nailed as far as quality and power go.