C'mon guys & gals, it's not about which is the best software (because there is no doubt!
) it's about what you are happy with/can afford/use.
I have CS3, Lightroom and NX - I would not want to be without any of them as I use them all differently for different tasks. But I'm equally sure that if all I had was Gimp/PI/PSP then I'd still make do - they are after all only tools and it's my creativity which makes (or breaks) the images.