Techno is a very bad generalization that people are using now-a-days to describe anything "electronic". Which means that they are calling Trance, house, Goa, Prog, and all those other genres techno. So don't use it. A much better generalization would be "EDM" (Electronic Dance Music).
I mostly listen to trance and house. I used to be really big on techno but it kinda grew out of me when I discovered trance and house. I don't listen to chesse (AKA bad!) artists such as DJ Sammy, Ian Van Dahl, Scooter, 4 Strings, Alice DJ, or any other those other crappy artists. I listen to more premium stuff. Here are some artists and songs that I highly recommend if you want a taste of what Trance is like:
Adam White & Andy Moor Presents Whiteroom - The White Room
Adam White - Ballerina
Bjork - Pagan Poetry (Infusion Remix)
BT Feat. Caroline Lavelle - The Great Escape (Armin Van Buuren Rework)
Dylan Rhymes Feat. Katherine Ellis - Salty
Envio - Time to say Goodbye
Evolve - Safe to Dream
Ferry Corsten Feat. Shelley Harland - Holding On (Above & Beyond Remix)
Filo & Peri Presents Whirlpool - Under The Sun (Solarstone Remix)
Haak Presents Annunaki - Frenzy (MK-S Remix)
Of course getting these songs can be a bit of a problem since it's pretty hard to get quality trance now-a-days except by vinyl. That's where I come in since I actually have the music. Just hit me up on AIM or something.