How about the classic:
Darude - Sandstorm. Many people say it was over-rated. I say it was, to an extent. It had little progression or development, but it brought a new sound to the trance scene.
Any trance fans here?
Now there is some classic tuneage right THERE my friend!

If anything, Trance, Electronica, Techno...anything along those lines I could listen to for ages

Anything with a rhythm to get ya outta your seat to make your feet move! I'd have to say the Dutch man DJ Tiesto's got my fav place at the moment but there are some classic pieces out there than I could listen to time and time again:
Kernkraft 400 - Zombie Nation
Faithless - Insomnia
DJ Sammy - Heaven
William Orbit - Barber's Adagio for Strings (to name a select few)
Does anyone out there on the scene go as far as listening to the real hardcore Trance stuff? It's a lot faster and much more energetic breed of beast compared to say the likes of the ones I've named above. If anyone's interested, look up names like Dougal & Gammer, Hixxy, Dark Monks etc. That's more of the hardcore artists. I've also got a number of trance remixes of tunes like Final Fantasy 7, Never Ending Story and even Tetris! Gotta love 'em