Samantha,
Ps is great..I'm using v5.5. However, be prepared to pay bucks for it unless you have that student ID. Indeed, it may pay off to enroll in a couple of photography classes and get the discount. However, if you can't do this, consider this. Many decent printers out there come bundled with PS 5.0 LE and a coupon to upgrade to the full version. PS LE is not the full-function version, of course, but I used it for a year before getting the full 5.5. version and it worked for me. I don't do pre-production at this point, so for me, PS 6.0 is overkill (but I wouldn't push it away if it appeared under a Christmas tree!)
If you are a beginner to this, you might also want to consider PS Elements. I haven't used it, but I hear that it is a nice package and comes with a coupon inside to upgrade to PS full version for less than $200.
You might also want to ask around if anyone has any used software they might want to let you try out to help you decide what you want to use.
Stew