Suggestions: With occasional special exceptions, it's a given that the "big boys" will dominate the market; you can't win a direct assault, moreover, you almost certainly can't win a major share of the market. With these as givens, then what CAN be accomplished? I'd suggest a couple of things. First off, aim at capturing one or more market segments. Considering the nature of your outfit and the quality of your product, you almost certainly should be targeting the techie segment. These folk respect good products and on principle hate MS. You need to position yourself well for them to see you. Another segment might be teentsie, one-person or few person outfits (of which there are a LOT) who are often seeking less expensive but still viable products to meet their needs. An example of this is the widespread use of OpenOffice. Of course, it's free, but that's not the point ... my point is that if it were inexpensive enough, compared to MS Office it would still be attractive to this market because of the high marks it gets. And that's the third point: You must, for both segments, gather as many excellent references as possible. Different ones for each, of course, but these testimonials are very effective.
How to find and then address your marketplace is another entire challenge, and one I've not thought much about. In fact, I'm certain all the above has already been grist to your busy mill; but you invited suggestions, and I'm glad to oblige.
Tony in Rindge.