I think that a free copy of Window Eyes is pretty good if you buy MS Office. MS Office certainly costs a hell of allot less than the latest version and flaves of Jaws.
Outside of that, Apple does a nice job of accessibility with VO if you can grab a Mac, at least you don't have to pay 1100 or 1200 for a mac then another 1G or more for a decent screen reader but paying 6 or 700 for a windows PC and NVDA for free is pretty gd too.
73:
Mike VO1AX