Best Speakers for a Sony S550?

[Rob89]

I'm looking for a good set of 5.1 Blu-ray speakers for my Sony BDP-S550, which will be played on a Panasonic Plasma model: TX-P42G20B.

I was looking them up and thought "Wow those are expensive", then realised they all come with Blu-ray players! I just want the speakers, not the Blu-ray player.

Also to be a bit more specific, two front speakers that look something like this:
http://img413.imageshack.us/img413/6295/81723461.png
Don't want anything to bulky.

And two rear speakers which i can hang up on the wall.

Any help pointing me in the right direction is much appreciated