Techno is a very dated term referring to dance music, I am assuming since you used the word techno to describe dance music you have generalized the genre, am I on point here? Ya I think I am.....
I like more specific terms, but here is a few of my favorite trance/progressive/melodic trance cuts....
Armin Van Buuren-Communication Part 1, 2 or 3
BT-Mercury And Solace (Transa Mix)
DJ Tiesto-Adagio for Strings
Hemstock & Jennings vs Adam White-Reverence (Darren Tate Mix)
IIO-Runaway (Ford Mix)
Oceanlab-Sky Falls Down (Armin Van Buuren Mix)
Paul Oakenfold-Ready Steady Go
Signum-The Timelord
A few of my favs