5.1 Speaker Placement at PC?

Hi everyone,

Looking for some advice on the layout of a 5.1 speaker setup at a gaming PC (will also be used for bluray watching and music, but PC gaming is the primary concern). I've had a good look at layouts for home cinema setups, but in my case the listening position is obviously going to be near the front speakers instead of the rears.

I can add a diagram later if it helps, but the room is essentially a square (3.7m x 3.8m) and the PC desk will be against one wall and placed centrally along it. I'll be using wall mountable bookshelf type speakers.

Any other info needed? All feedback appreciated!