Since joining this forum a little while ago, my interest in post processing has dramatically risen as I see the stunning work/enhancements or simply presentation done by other photographers.

I'd like to get opinions on whether I need to (or should) go out and buy Photoshop or is GIMP perfectly sufficient.

My thoughts are the GIMP is probably sufficient, however, there are MANY more tutorials/tips etc on PS than GIMP to help me learn and develop, and I have a lot of learning and developing to do.

Is there another alternative?

thanks in anticipation.