I really like cs5, some of the new stuff the've put in is pretty nice!
The active content fill is brilliant! you dont want something spoiling your picture? its gone, an no need to use the clone stamp, just select what you dont want, shift and f5, and its gone!
The only problem i get is, it says it supports .3ds files, but everytime i go to use it, it keeps giving me an error about not being able to open the file.
but yea, ild go for cs5 over 4 anyday! even the indesign has a few tweeks that i wonder how i got on without them!