Adobe Audition should be just fine for your use. I use it for cleaning up recordings and doing all sorts of wav editing. It has several features that will work for you. There is an automatic click/pop remover and there is a hiss reduction function. There is also a noise filter - you can record a sample of unwanted noise and then the program will remove anything in that range. Just a word of warning - use a light touch with cleaning up the transferred wav. If you remove too much the resulting sound can be hollow and flat.

Kathleen