Does anyone have an opinion?

I'm considering the purchase of instrument recording computer software and I do not now where to start. Does anyone have or now of a good program that will allow me to record/mix/re-mix/edit live music? Music like me playing a guitar, or harmonica, or something else. The program needs to allow multiple recordings to be layered in order to produce a final product.

Essentially I want to turn my computer in to a super functional, super quality music production studio.

Thanks for your thoughts,
Hopper