All tracks are very well known, but this is exactly where the problem lies with that kind of compilations.
All big name DJ's want to add only well known tracks on the compilations, but there are many awesome, yet rather unknown gems as well. Be bolder and dig deeper into some particular era of Trance and you would be surprised how many massive tracks are particularly unknown, and this is mainly due to the DJ's who would only spin music from the big labels or more famous producers.