For those looking for a Phtoshop killer - try Pixelmator. It is actually in closed beta, but you can check out the site and watch the video. I am in the beta, and I can say that the product is amazing, and only costs $59.
Have you used Acorn? If so, can you compare the two?
Pixelmator is squarely aimed at being a Photoshop alternative where Acorn is aimed at people for whom Photoshop is overkill. Does that make sense?
In other words, there are probably 100s of times when I open Photoshop to do something small, like make a minor edit, or resize a screencap… something where a $600 tool is overkill. That’s where Acorn really shines. But its not a Photoshop replacement… aka when using Photoshop for value appropriate work such as detailed print work or serious image editing, Acorn is not meant to be an alternative in such situations whereas Pixelmator is. Whether Pixelmator is a good alternative in those situations, I don’t know. My meager image editing skills aren’t enough to really test that.