Thanks.

2) Most likely I'll be sitting 8 feet away from the speaker and I intend to have them 6-8 feet apart.

4) Then I cancel my idea.

6) At first I think I shouldn't spend the money on feature that I seldom(never) used. However, I may have to pay more if go separately. I don't have a AV receiver in mind yet (mostly among Marantz, Denon, Harmon Kardon, Pioneer or Yamaha).

7) At first, I think I can buy a 'less powerful' AV receiver and use it to drive the front speaker only and using my old equipment to drive the centre and rear (just want to save some money).

Thanks for sharing.