It was nice going from CS2 to CS4 but was there massive changes? No.

Yes, CS4 did cost more than $1000. It was Adobe CS4 Design Standard which included Photoshop, Illustrator, InDesign, Bridge, and Acrobat 9 Pro at a cost of $1,800. At the same time I got CorelDraw X4 at a cost of $430 for the whole suite. So with tax for both it was a whopping $2500 Canadian. Since then I've upgraded my CorelDraw X4 to CorelDraw X6. At least Corel lets you skip versions.

if you have the money then go for it. I'm just old school and I prefer to own rather than rent my software.