I think it depends what you have to pay for it. I'm not sure I would have forked out the full price for the app but I bought Vegas 6 from B & H Photo and then the download upgrade from Sony. I first looked at Vegas many moons ago when it was still a Sonic Foundy product and didn't like it (I was a committed Premiere 5.1 user). Now I've spent the time first of all with the trial and then the full version, it's got a mammoth amount of pro-level features that I'm slowly getting to grips with.
Currently B & H have a fantastic offer for Vegas Pro 8 here:
http://www.bhphotovideo.com/c/product/536041-REG/Sony_VP8Q_Vegas_Pro_8_Video.htmlNote that this does
not include DVD architect so may only be of use if you already own other DVD creation software.
Having said all that, I still think PE knocks the spots of all other comsumer-level NLEs and if I had the money I would have bought Premiere Pro no problem. As it is, there is no argument that Vegas has been incredibly good value for money and I haven't actually run up PE since I started using Vegas in anger.