This will be my first Home Theatre setup and my first High Quality sound setup, aside from my Headphones. The Home Theatre system is going or be for a small space, about 100 sqft so I'm only looking at a small Receiver.

The Denon 1909 receiver is rated as follows:
- 90W (8 Ohms, 20Hz - 20 kHz, THD 0.08%)
- 120W (6 Ohms, 1 kHz, THD 0.7%)

I'm looking at:
2x M60
1x VS150
2x QS8
1x EP350

I know, the M60s may be overkill in this space but I'm really looking for full range sound from my mains. Now on to the questions!

1) I've never had really good Audio gear before. Is 0.7% THD noticeable? If not, question 2 below doesn't matter.

2) Is THD a function of the Wattage you're pushing? In other words if I'm putting less than 90W into the VS150 will the receiver be running at 0.08% (or less) THD, and the THD will increase as the Wattage runs up to 120W?

or… is the THD a function of the resistance. In other words if I plug a 6 Ohm speaker will the distortion be running at 0.7% regardless of the Wattage / volume I'm listening at?

Thanks