I'm actually in the same position as you (considering the purchase of some floorstanding speakers, a receiver ... and also a sub). I was looking at the BB & Futureshop deals, looking what I should jump on. Just wanted to comment on a few things I've found, and a few things that I've noticed that have been posted.
The Polkaudio speakers have some questionable reviews regarding the tweeters blowing at a moderate level, maybe people are idiots, maybe not... but there are multiple complaints about this. Also, if you checkout frys (in the US) you will see they are offloading the R50's DIRT CHEAP ($60 a speaker). Also, the "sale" price in Canada doesn't look that impressive compared to US prices (and our strong dollar).
The Klipsch has a great name of course, someone mentioned that the BB site in the US had the F2's for $24 dollars more... they didn't read everything, the price was for an individual speaker NOT THE SET. The F1's in the US are going for $242 each (on sale) which is 484 for the set... so the $300 canadian (or $150 each) is a bargain and a half! Though these speakers don't have as much power, and only 1 woofer I'm not overly concerned (mainly becaues I'm planning on buying a sub too probably
Also, you may want to look at the Yamaha HTR6060 On sale for $399 (save $200). I'm a fan of yamaha, it's 7.1 surround as well, and has all the other decent features.
Anyway thought I would give you my 2 cents. I'm probably going to go with the Klipsch F1's and the Klipsch KSW-12 with the Yamaha receiver. They aren't the hugest system, but I feel the quality will be superior. And there's always room for upgrading later