To be honest, you're a wild card candidate -- whether you get in will be even more a subjective thing that will vary from one individual adcom to another (i.e it's less about the school, and more about who happens to read your case).
While I can understand how you're feeling about your career, I'm not sure if going to school full-time with people who are 10-15 years younger than you are will be the best thing; 10-15 years difference may not mean a whole lot between say a 40 and 55 year old, but most 40 year olds will feel out of place in a sea of twentysomethings. That's really something only you can answer, as it will vary from one person to the next. What you should do (if you haven't already) is to visit a few schools NOW while class is still in session (until early May), and get a feel for what it feels like to be around a bunch of current MBA students. You may feel it's what you want, or you may feel out of place.
In any case, if you are sure you want to apply, go for it - because you're such a unique candidate, you might as well just choose whatever schools you'd love to attend, and just do your best on the application.
Another alternative is to do an executive MBA or part-time program, where there will be more people at your stage in life and whom you'll have more in common with (especially an exec MBA program). In fact, assuming your GMATs are solid (high 600s, ideally 700+), you should have no problems getting into any of the top exec MBA programs - whether it's Stanford Sloan (Stanford claims it doesn't have an exec MBA, but their 1-year Sloan program is basically an exec program), Haas exec or part-time, Wharton exec MBA (in the Bay Area), and so forth.