Should I upgrade to cs3 and as3

I currently use flash8 and am just about getting by. I am learning oop actionscript and I feel confident enough using actionscript 2 but I see alot of sites and posts about cs3 and feel like I should maybe make the effort and move up but the learning curve seems steep do you think I should graudually learn whilst using flash8 or should I take the plunge??? I hear a lot about cs3 having improved performance but I didnt think that was an issue with flash 8.

Any advice would be welcome and if you know of any simple tutorials that would be nice too.

I dont know if I am posting this in the right place suppose if not someone will move it.

Cheers in advance