Under Unix, your major choice is between Netscape and Lynx. Netscape is a full graphical browser, which looks just like the PC browsers. You should consider Netscape if you are using an X terminal, or if X software is available for your PC or workstation. It is also possible to specify a URL in the command. Lynx is a text-mode browser.
Lynx is generally much faster than Netscape or any other graphical browser.
Also, visually handicapped people sometimes find it easier to deal with pure text output. Unfortunately many web pages are now designed assuming that you have a graphical browser. Thus many pages will be hard to read with Lynx. Pages that use Java, Javascript, or any other extension will not work with Lynx. Thus Lynx is now considered a last resort.