Howdy,
I use Photoshop Elements 5.0 and I've got growing pains
Eventually, I need to upgrade to something that allows more creative control as far as Raw editing and channel mixing (whatever that is).
I use PSE for portraiture and art photography. I like to add nice text to photographs as well. For the future - I will experiment with infrared photography too.
CS3 looks big

so I don't want to jump into it without exploring other options.
To you PENTAX users - what plug in do you use if you're using photoshop
Thanks