Why does everyone always think that 5000 polies are too much?
As long as they are needed to make the model look good, you can also use 10000 polies. If you are a bit carefull when using them, it is absolutely no problem.

The model looks very nice, but as ulf mentioned, he doesn´t perfectly fit for a runner

Lite-C Tut. 1 Lite-C Tut. 2 Lite-C Tut. 3 (en)
Shader Tutorial (ger)

http://www.slindev.com