Dreamweaver is by far a superior web development application to FrontPage. It has better CSS support, better code handling, and is much better at following web standards.
The only arguement in Microsoft FrontPage's favour is that it is likely to be the only software that handles FrontPage Extensions. These are server-side addons that do functions like sending e-mail forms. However, the same effects (and much much more) can be achieved with any server side programming language such as ASP, PHP, Perl, etc.
Go for Dreamweaver, or at least download the trial and see how much better it is.