And Anwar, that's part of my problem. I don't really want anyone to match them, and if we do see such a match, it deflates the view that they are so unstoppable, especially if the way to defeat their opponent actually comes from Voyager personnel, IMHO.
Why can't there be any matches for the Borg? Would you complain if we ever saw Q destroy a Borg Cube?
The Borg are not some unstoppable super-enemy, they are just Tough Cyborgs who are more advanced than the Federation. We've encountered several aliens throughout all of Trek that were more powerful than the Borg, so there's NO reason to treat them like something special.