Some of the best promotional literature you'll find is the quarterly catalogs. If you've purchased or registered any SONY Media Software then you're probably on their mailing list, unless you've specifically removed yourself. I usually get about 5 of these each quarter and they quickly get snapped up by folks asking me for advice on audio/video editing software.
You can also download the demo. Just click the "Download" button on the top of the forum here. Also, unless you plan to buy a whole brand new computer (and i'm assuming it will be a prebuilt one) your decision will be more based on what computer you hve: apple or PC.