yamaha rx z7bl 7 1 channel high end network home theater receiver

Hey All, I have a 5.1 B&W CM9 setup with Towers in the front / bookshelf's in the rear. Do I need a dedicated amp? I have been using my RX-Z7 Yamaha receiver which supplies 140 watts per channel, but I wanted to know if I would see a big increase in quality with an Amp. Thanks!

 IMG_0181s.jpg 149k .jpg fileHello all: I've been trying my best to cure a SEVERE channel change lag problem with a replacement DVR I picked up on Monday. Replaced another 8300HDC which had a hard drive failure over the weekend. Best that I can determine, the severe lag only occurs when...

I need to pick up a new receiver to replace my Yamaha RX-Z7 and I'm looking at the Pioneer Elite SC-75, Denon X4000, and Marantz SR6008 and trying to decide which one handles 4K the best along with having a nice looking GUI? At this time I've ruled out Integra and Onkyo due to their HDMI board...

 More photos - http://www.facebook.com/album.php?ai...5&l=6b60ef4e33 Receiver/amp ------------------- Yamaha RX-Z7 receiver (with iPod dock) Emotiva XPA-3 (Driving B&W L/R/C speakers) Crown XLS 1000 Display ------------------- Panasonic TH-PZ85U plasma TV Network ---------...