Darren,
In my opinion there is no better user forum than
Cakewalk's Sonar forum. The company really supports its users well, and there are some very knowledgable people there.
If you are a Windows user, Sonar almost seems to be a no-brainer, as it is to my knowledge the only major DAW software that is developed for Windows. Cubase/Nuendo is Mac software ported to Windows. (Have you guessed I'm a Cakewalk user yet?)
M-Audio make a lot of good gear, including audio interface cards, breakout boxes and midi controllers. The Gear forum at the Cakewalk site is also a great place to ask about gear.
My best advice would be to research as much as you can before you buy, and make sure your system is robust. Win2K/XP is a requirement for Sonar 3 or later.
KVR-VST is a great forum for discussing virtual instruments, effects and so forth.
There are a few relatively inexpensive orchestral programs out there to start with for scoring, which include Garritan Personal Orchestra, EastWest Symphonic Orchestra Silver and a new product call Synful.
And be careful, because this stuff gets addictive! I just recently purchased a Mellotron emulator and a Minimoog emulator, and I swear these things sound like the real thing.
Good luck!