Just remember your IDE and PCMCIA will not be available when using Kickstart 1.3. And, there will still be problems with games/demos that TUDE can't help.
For instance, I haven't been able to get Dragons of Flame to work with TUDE and my A600. I'm pretty sure I got it working on my A1200 once but I can't remember how I did it. (I haven't really tried that much as the game isn't so good, but it's a very system un-friendly game to test degraders with...)