Good choices for the receiver, not so good for the speakers and sub. If I buy a good receiver can I just plug in my old speakers as I purchase new units (because of money restraints)? Afraid not. Those Sony speakers are 3 Ohm and thet will probably put the new receiver into self-protect mode and shut it down. I'd take the marantz over the other two but we all have our own preferences. But the 5006 is more in line with the Onkyo 709 and Denon 2112. Crutchfield is a nice place to go and learn things. It's also a good place to find information on products they carry, including those that have been discontinued. AperionAudio.com has their "Aperion University" which is also a good place to learn. "Let me know if you see flaws.' Klipsch fronts, an Infinity center and Polk surrounds and subwoofer. Where do I start
. The front three speakers really need to be from the same series/brand since they often produce the same sound, either at the same time or as sound pans from one side of the room to the other. The surrounds should be the same as well but it's not as critical. Klipsch fronts and an Infinity center is really not a good idea. Klipsch speakers are usually very much on the bright side of the sound spectrum. Infinity is almost on the other end with a softer, warmer sound. They don't match the sound of Klipsch at all. Polk is usually a bit brighter but not like Klipsch. The Polk 150's can be used as surrounds but there has to be a better option. Keep looking. Polk makes pretty good speakers but again, you can do better for the subwoofer. Make a decision on the Klipsch fronts or
the Infinity center and then consider getting the same brand to match it for the rest. In full disclosure, I have Infinity Beta's in one of my rooms. Love 'em. Give us a budget on the sub. Under $100, Dayton from Partsexpress.com. Under $200, the BIC F-12 or V1220. $200-$300, Lava with HTF discount or Elemental Designs. Over $400 HSU, SVS and Elemental. There are others but those seem to be the most often recommended..
"Everyday room": Panasonic 58" Plasma, Dish HD DVR, Pioneer Elite vsx-23, BDP-23 BR, dv58avi universal dvd player, Paradigm Studio 20 V1, CC-450, Dayton HSU-10 subwoofer.
"Movie/Music room": Toshiba 65" DLP, Dish HD receiver, Marantz 7005, CC-4003, BD-7006, Polk LSI25's-LSi7's-LSiC, 2 original Dayton 10" "Mighty-Mites" subwoofers. (subject to change without notice).
Also have MB Quart Vera VS05 +.....too much to list. Help me.