On other hand, Illustrator is a vector-based postscript drawing program, which functions by generating curved paths (Bezier curves) connected by modifiable anchor points. These anchors, are ultimately editable using their handles, and never leave structure of file. A vector-based drawing program creates various elements of image as individual vector objects which retain their characteristics but they do not become part of a "bitmap." Illustrator is thus ideal to use with complicated graphics like maps, logos, or even publications for print like ads, brochures and others.

Because of these differences and unique capabilities, graphic design professionals and higher-end hobbyists actually own BOTH programs. Again, bottomline is choosing right application for your project instead of thinking which one is better than other as they’re both good in what they do.

As for issue on pricing, well, a less expensive version of Photoshop is Photoshop Elements. It does about 90% of what Photoshop can do, minus higher-end pre-press printing capabilities.

Image map is also a style where one image is divided into “hot spots” for navigation. The advantages of image map include an easy set up of one image. However, this style has many disadvantages. First, they create frustration when trying to put in another link. With regards to users, it requires them to actually observe in order to find right boundaries.

Apart from different styles of links, you must also decide how to layout. Basically navigation location is up to you, but endeavor some proper positioning. Explore your imagination to get what you want to achieve. Remember that navigation should be in interest of your visitors. If they have trouble finding their way around your site it means that navigation is not effective. Try to plan it again until you have best results.