For businesses: Photoshop rules!
For home use: Don’t pirate Photoshop, and use Gimp instead, which can do all the basic stuff you need to do anyway.
Personally, I’ve used both Gimp and Photoshop, but primarily use Fireworks just because I’ve been using it for many years and am very familiar with the interface.
After Adobe bought Macromedia, they now own two of the most popular commercial image editors, Photoshop and Fireworks. Would be interesting to see what is the roadmap for these two quite-similar products. With Photoshop probably being the bigger brand, I suspect they just might fold ol’ Fireworks into Photoshop.
Go on to Gimp vs. Photoshop