I have Photoshop and I got it way back when I was a student. If I had to do it over having to pay full retail, I'd say that Poppi is right. Unless you have a compelling reason (paying customers who demand it) I'd recommend PSP. Next, read hold off just a bit on the Zbrush. UVMapper Pro is just over the hill (at least for PC users). If you read the list of functionality improvements you'll see it allows you to use photoshop (so presumably PSP). You can even see the updates in real time. UVMapper Pro may have nearly all the functionality at a much lower cost.