Of course, as I find most people forget to mention, is of course Macromedia's Fireworks, which interfaces with perfectly with Dreamweaver... A must for vector graphic development...
And its very easy to learn... Learn this first, and Photoshop will become a doddle
Trust me... forget Paint Shop Pro, especially if u want a graphics package for the web... its an amateurish package, hence the price tag... So dont waste ur money on it...
Photoshop is the industries standard imaging package, and if u have Adobe Image Ready... which is normally shipped with Photoshop... U have all u need.
I hope this gives u more of an insight to ur question
