I currently have Polk FXi3s, RTi10s, and a CS1. I also have a DT pf15 sub which I plan on replacing shortly. I am getting an Onkyo 606 today so I need two more surround speakers. My room is 14'X17'. My Polks aren't the best so I just need a descent set of surrounds. I watch TV, game, BR and HD-DVDs, and lastly listen to music in this order. Also, should I use these as surrounds or rear surrounds? I figured the FXi's would be better as surrounds since they are duals.

Just to slow you down a bit, simply because you're getting an Onkyo 606 today doesn't mean that you have to have a 7.1 setup. There are very few BD discs that are mastered with 7.1 audio. Hopefully this will increase, but my rear speakers in my basement theater get very little use. Yes, you can matrix a 5.1 mix to use 7.1, but I actually prefer the 5.1 over this, personally.

If you don't rush into it, you can make a more informed decision about what speakers to get and where to get them. Just thought I'd let you know.

I agree with schroedk. Because your receiver is 7.1 does not mean you have to go 7.1 with your speaker setup. A 5.1 setup will work just fine.

I would only get the extra two speaker if you have the room to expand to a 7.1 setup. If not, you're better off sticking with 5.1

Dolby recommended 7.1 layout:
http://www.dolby.com/assets/pdf/consumer/home_entertainment/71.pdf

I picked up the 606 today. I know I don't have to but I would like to have the 7.1. My room in 14'x17'. I don't plan on buying the speakers today, in the next couple weeks. I was looking for some suggestions on what I need to look for. Thanks for the replies.

...but my rear speakers in my basement theater get very little use. Yes, you can matrix a 5.1 mix to use 7.1, but I actually prefer the 5.1 over this, personally.

One reason for that: The 'randomized' nature of the pseudo EX/ES extraction process applied to a lossless pair of surrounds is most likely to result in surround and rear channel signals which are significantly 'poorer' effectively 'more lossy'] when compared to the equivalent channels extracted from a high bit rate lossy 6.1 EX/ES track [...which defeats the purpose of choosing the lossless 5.1 track in the first place!]