Looking for good audio mixing software?

extended story short i have.flac sound recording from a few friends that should be torn separate and combined with some refrain.what is some good software due to this (willing to spend some money although not break bank)

http://www.sonystyle.com/webapp/wcs/stores/servlet/ProductDisplaycatalogId=10551&storeId=10151&langId=-1&productId=8198552921666304170&SR=sony_search_seo&SQS=software

http://www.sonystyle.com/webapp/wcs/stores/servlet/ProductDisplaycatalogId=10551&storeId=10151&langId=-1&productId=8198552921666304168&SR=sony_search_seo&SQS=software

http://www.adobe.com/products/audition.html

And also, of program, there’s always former (and free) Audacity.

http://audacity.sourceforge.net/.