Re: Same mistake
"There aren't any alternatives to their suite for professional use."
Maybe not as a bundle, but there are alternatives. As a disclaimer, I have and use CS5. I just don't feel like I have to.
Photoshop - Gimp. It can do anything Photoshop can. There's a bit of a learning curve, but it can get the job done. In fact, I spent years using Gimp exclusively and actually prefer it to Photoshop.
Acrobat Pro - Foxit Pro if you REALLY need the kind of features it offers, but honestly in my experience most PDFs could be done with Office and a PDF printer or LibreOffice by itself.
Flash Pro & Flash Builder - Silverlight...or just learn HTML5 and do away with plugins entirely. That's probably the better option anyway, given the number of iPads out there.
InDesign - MS Publisher comes to mind, but I'm certain there are others. Desktop publishing isn't my thing.
Fireworks - To be honest I've never actually used Fireworks. I just don't see the need for this application, even as a web professional.
Audition - I don't know what the alternatives are, but none of the musicians I know use Audition. Granted these aren't people you've ever heard of, but one of them actually pays his bills (barely) off his music gigs and selling CDs that he makes in the studio in his basement.
Media Encoder - There are only about a zillion encoder apps out there. Given that they all do about the same thing and half of them are free, pick one.
Dreamweaver - You could use KompoZer or Sharepoint Designer, but personally I'd rather use Dreamweaver.
The rest are tools I've never used and thus can't comment on. I will say this though: to say there's no professional grade alternatives to pretty much anything is to be just plain lazy (or a shill, but I'll give you the benefit of the doubt). There are ALWAYS alternatives, even if you limit yourself to professional grade software. You just have to put out a little effort to find them.