you should only get them if you need them. If you’re getting like 3 though, 3 that are in the studio, then you might as well just get Studio MX since it will be about the same and you get the full collection. It doesnt include director or jrun and only a developer edition of coldfusion, but it still beats full price for them all (I have studio).
Contribute you dont need if you have dreamweaver. Contribute is the dumbed-down version of dreamweaver for non-developers. You would suggest contribute to a client you made a site for in dreamweaver so that they could easily update it themselves.
central you wont need to purchase
jrun and coldfusion are server-based products which I doubt you would have much if anything to do with.
Director is cool but expensive and not part of studio. Its pretty typical for CD authoring and makes shockwave files. Flash is almost in the same class though Director is like the next step up (‘hefty’ in comparison) and supports 3D.
As a web developer, I only use Flash, dreamweaver, fireworks and occasionally freehand. I also work in Director but only for CD projects for work.
Flash and Dreamweaver are the biggies. Dreamweaver for websites and Flash for… well websites too but with more ‘flash’ and interactivity. Plus Flash is just fun. Fireworks is great too - a great companion to both Flash and dreamweaver but you can get by without it if you have photoshop. Still, there are somethings in Fireworks that are better than what you have comparably in photoshop/imageready (but at the same time fireworks is no photoshop).
Freehand is nice, and good for print vector work. For web vector work, though, all you really need is Flash for web stuff. Personally, Im more about Freehand for outlines and laying out ideas. There are some tools there that make doing that a breeze.
I say if you’re really wanting to get into the web field and you have some money to spend but not a whole lot, definitely take the studio route. And see how much it is for an upgrade from Flash MX too, since that should give you a break in price.