Originally Posted by mrow2
First, I don't have HD ...yet. I am refining my area first. I have a small theater room, dedicated to this. A new Onkyo TXLR552 receiver 6.1 channel, then my speakers are a (nice) patchwork of 6"bookshelf Advents for the rear (mounted in corners, up high, a pair of favorite 1965 Fisher XP5s for the front center and rear center (I plan to get a modern shielded front center soon), a Denon reflecting subwoofer, and two older Fisher front L and R speakers, each with a tweeter horn, two midrange, + one 15" woofer apiece. These sound ok and are probably efficient, but I plan eventually to replace them with smaller speakers, as they are large for this room. The sound seems good, I don't blow windows, so that is not a metric I am using. I was seeking fine sound at lower volume levels so that I don't disturb others in the house. My room is about 10'x15' (formerly a bedroom made smaller to accomodate a hallway down one side of it. The rear of the room is mirror closet doors, which remain closed. I face the opposite 10 ft wall, sitting 4' from the rear, not all the way back. Interested in comments on this system. I (at some expense and intriguing design) created a ventillation system, utilizing a small split-system A/C unit for a hobby room, ducted and fan boosted to this room, and an air removal duct inside the closet with another booster (the air exits between the closet doors). The two boosters are incredibly silent, and remote controled. This provides airflow through the room so that windows can remain closed.
I remember those old Fisher speakers. At the time I remember that for the money (then) they sounded better than they should have.
I have long since moved on from them to Klipsch speakers all around. Of course you know that having matching speakers all around is the best solution, but having timbre matched fronts/center are the most important if you are planning a gradual change out on the speakers.
First you will have to decide what brand, then style speakers you will like, then I would replace the center channel first (65% of all sound comes through the center chennel in a HT system). Next I would replace the front mains, then I would tackle the rears.
Klipsch speakers are very efficient speakers (around 94db @ 1w/1meter), so they would make your existing Onkyo AVR seem more powerful. Just for reference, every 3db increase in speaker efficiency, means you can cut the power needed to drive them to achieve the same volume level.
I also have B&W speakers in my game room, but they are much less efficient. Don't get me wrong, the B&W sound great, but they need more power to drive them.
I think the Klipsch have about the most bang for the buck, IF you like horn tweeters. I have a friend who bought Klipsch SS1 for both the front and back (the 4 corners), and Klipsch SC-1 for the front & rear centers in his 6.1 system. He went with a Velodyne VX-10 for the sub, because Klipsch subs are not as good as the Klipsch speakers as a whole are. I hear the new Sub-xx line is much better though. He got it all at www.vanns.com
as a (self designed) package deal for about $550.00. Check them out, and call to negotiate the best deal. Your room is bigger than his HT room so you might want to move up to bigger front mains (bookshelf series), but his system with a Yamaha HTR-5650 blows out his room.
Some other speaker brands to look at are; Infinity, Mirage, Polk, & Energy. You didn't say what your budget would be, so you can get lower cost systems from them all or move up to the higher end of these brands.
Others will tell you to look at some online only speakers which may have better bang for the buck, but I personally would not buy any speaker I couldn't listen to first.
Everybody hears things differently, so your ears with have to be the judge of what sounds good to YOU!
Good Luck & Happy Hunting!