I'm new to this forum and really glad I discovered it. My current setup consists of a Pioneer VSX-D906S 5.1 channel receiver, 3 Advent Baby Advent II (front and center speakers), 2 smaller Advent satellite speakers in the back, and a JBL powered subwoofer. My monitor is a Sony KP-57WS510 57" HDTV. I am contemplating upgrading the Pioneer receiver to a Yamaha HTR-5790, which I've read is an outstanding receiver for the money. I'm upgrading for the sake of improving my receiver, moving to 7.1, and being able to automatically switch audio and video via the receiver (as it is now, all my audio inputs go to my receiver and my video inputs go to my monitor requiring me to switch both boxes when I want to change, say, from my DVD to my Cable to my Tivo to my VCR, etc.) My questions have to do with the speakers primarily: Does anyone know if the speakers I have are any good and will they work well with the new receiver? Is Advent even in business anymore? How can I tell what the OHMs for these speakers are? (It's not shown anywhere on the back or bottom of the speakers.) Is it absolutely necessary to tell the new receiver what the OHM setting for my speakers is? Is that for the purpose of controlling power output or something else? If I want to go to 7.1, can I simply add a new pair of speakers for the back or am I better off buying 7 (or 8?) new speakers altogether? Any speaker recommendations that won't set me back a huge amount of money? My listening area is 300 sq. ft. Re: video, is it safe to assume that I won't lose too much in the way of video quality by funneling all my video and audio signals through the 5790? Currently, I use Component Video for my DVD and Cable Box (direct to the Sony TV) and I use S-Video for my Tivo and VCRs (through my Pioneer receiver to the Sony TV). I plan to connect my Sony TV to the Yamaha receiver via a component video connection.