Enhancing wav files

I have some audio I wish to enhance. Its the audio track of some analogue video I have captured and split into video/ audio tracks. IT is very poor quality audio, very muffled and deep and hissy. I’ve tried Nero Wave Studio and Sound Forge but the results from both I have to say were crap. Can anyone recommend a decent program that will enhance these wav (or mp2) audio tracks to something decent?

I’d say SoundForge is a very decent one. All depends on how you use a tool.