[Zholl]

To build on Andy's post, I'd say to choose one way of doing your website, but then learn the other as a secondary. I work on my team's website primarily on Dreamweaver, but it tends to generate code that isn't standards compliant, so I fix it using Programmer's Notepad.
Also, if you decide to do forums, I'd recommend vBulletin, like what we're on now, if you have the funding. Unfortunately, it costs upwards of $100 to use, and has yearly fees attached depending on how you do it. If you don't have the funding for vBulletin, I'd recommend phpBB. It's plenty functional, though not as much as vBulletin, but it's open source as well, so if you have coding experience you can change it as you please. Best of all, though, it's free, so if you're like my team and don't have a lot of extra cash lying around, it's more than plenty.
Oh, and if you're storing a copy of the site offline, don't put it in a school directory. Our coach is getting emails about Scottie (my superior in the web development team) because he's taking up something like 80Gb of storage on the school data server and they're freaking out about it.

Unfortunately, I don't have experience in some of the other things Andy's mentioned, like the newsletters and photo galleries, but feel free to contact me as well. I'd be glad to help with what I can, though I'm probably not as knowledgeable as Andy here