I am planning to buy a 7.2 channel receiver (Denon or Onkyo). For the speakers, i was planning to go with Bowers and Wilkins. But I was quite impressed with the Martin Logan Speaker reviews. So, I plan to buy the Front Speakers (Left and right) from Martin Logan. For the other channels, I may go with Bowers and Wilkins Here is the real question - Does any one know the difference between the Vista model and the EM-ESL (Electro Motion ESL series) speakers? If Vista and EM-ESL were priced same say, which one is preferred?