Hello friends, I am new to this forum. And yesterday I have got my new SONY STR-DH770 7.2 Channel AV Receiver shipped in from USA. I have ordered an step down transformer from Maxine. Now I am planning to buy Yamaha Ns-P40 5.1 Channel speaker Package. But to complete 7.1 channel set up I need one more pair of bookshelf speakers. Since my budget is tight I need a cheap one with 6 ohm impedance ( 6 ohm impedance resembles to Yamaha Ns-P40). I am from Kolkata.