Need two very small speakers to complete 7.1

[tilapiah6]

My equipment is listed below. I'm interested in getting two tiny but decent speakers to use as the rear surrounds. Looking at my HT, you can see that my couch is literally up against the wall, and I'm wanting the two speakers to go on the wall slightly above listening level pointing down. In addition, I'm only looking to spend around 60 or 70 bucks, and I would prefer they be 8 ohms. Does anybody have any suggestions?

(When I say tiny, I mean like Bose cube tiny)