I am researching speakers that will be most suitable for the 400 Watt 5.1 channel Yamaha RX-V995 A/V Receiver that I just purchased. I really don't know whether to get a set of home surround speakers for it or to just get two floor standing speakers as the mains. Right now I have 4 Polk bookshelf speakers and a Polk PSW 404 subwoofer. Can anyone please recommend which I should be looking at, best brands, best places to buy, etc. I can only spend a total of around $300.00, so I guess the Meridians are out.

Thank you so much in advance.

Christina