I have CS3 extended and I dont even know what the extended bit means and I dont think I want to know.
CS3 is too much for my needs and I dont have the time or inclination to do too much with it.
I was spending too much time at the computer instead of hunting out good locations for shooting photos.
I have photoshop 4 which is good and cost nothing and keeps everything in order.
I would try the Corel to see how it feels but the cost would be important as I have too many other things to buy.