I own a Yamaha RX-V477 amplifier. I thought that it would be a great idea to pair it with Klipsch 5.1 speaker system. So I bought Klipsch R 15M bookshelf speakers as my front speakers (left and right). I do not have the option of buying floor standing speakers as someone is getting it from USA for me and they are pretty heavy. I intend to purchase a Klipsch RC-42 II center channel. The rear 2 speakers will probably be a Klipsch R14 M that I am yet to purchase. Subwoofer will probably be Klipsch R 10SW or Yamaha NS SW 100. Any ideas as to what issues I could run into would be great. Is the amplifier too underpowered for the speakers? Are bookshelves fine to create a 5.1 as I have described above? Any kind of help or direction would be much appreciated.