Bookshelf speakers for Home Theatre and Music

[RoyRoyRoy]

Hi everyone,

I'm looking for a pair of bookshelves for my 5.1, with a Denon AVR-660H. I don't listen at loud volumes as my kids sleep early.
I have a small living room, about 12 feet by 12 feet, with the back of the couch open to the dining room, also the same size. I have some Polk Audio RM201 on speaker stands that are OK, but looking to improve as I just got the Definitive Technologies ProCenter 2000 centre speaker for $100 used to replace the RM202 (same as RM201) and it made a big difference! I also have a Klipsch Sub-8 subwoofer.

In the used marketplace, I found:

1. Energy Connoisseur C-2 - $125
2. Energy Connoisseur C-3 - $100
3. Energy e:XL-15B - $80
4. Energy AC-300 - $360 (kind of out of my budget)
5. Klipsch R14M - $120
6. Polk Audio RTi-A1 - $175
7. PSB Image B5 - $150

I'm thinking the C-2 or the C-3 or the B5. I'm not loyal to any company, just looking to find something a bit better, at a good price. If anyone has listened to these before, and can offer any preference one way or the other, it would be greatly appreciated!

Edit: Added some random links for info about the speakers.

Thanks.