This is taken from Lost Tribe - Gamemaster. It hits my angle right on, since when did the exploration of space find a habitable planet like earth.

"I've seen things you people wouldn't believe. Attack ships on fire off the shoulder of Orion. I watched C-Beams glitter in the dark near the Tanhauser Gate. All those... moments will be lost in time like tears in the rain... Time to die..."

Some dreamy stuff taken from Paul Oakenfold - Bootleg (Part 1 19:00) It's a sample from Blade Runner. I love stuff like this. Intelligent stuff. Not cheesy cheap standard commercial Trance stuff like omg, this sample (26s).

Sometimes Philosomatica.com plays really good stuff. If you get skipping make sure you don't use the MAD WinAmp plugin (delete it). It doesn't have any streaming buffer settings.

Styles

Trippy
The trippy style is very, well, trippy. It's fast and psychedelic, like uh most goa. I don't really know but this song seems to define trippy.
Trippy sample: Cosmosis - Alien Disco (Cosmosis: Cosmology )

Melodic
This will catch you and make you move, though you might get tired of these songs soon if they don't hold back a little.
Doesn't hold back sample: Pharagonescia - Pharatropic sample (VA: Destination Goa 2)

Groover
I think there are two types of groovers, one that is funky and one that is just "rolling".
Funky groover sample: Koxbox - 6 cells (Koxbox: A Major Problem In Australia)
Rolling groover sample: Para Sence - Birdday

Other Interesting details

The Goa scene is also about things like:
- Using any instrument they can fit into the song in a good way, piano and guitar is an example (usually made electronically with a synt)

Electric guitar:

Infected Mushroom - JJJ elektro banjo sample.ogg Get the Flash Player to see this player.

- Wierdest electronic effects that they somehow manage to fit in

And lastly they like to mix in strange, beautiful, funny or scientific voice samples:
Beautiful sample: The crystal of art - Blessed be (all the pain will set you free)
Scientific sample: Hallucinogen and Ott - Gamma Goblins (It's Turtles All The Way Down Mix) (Hallucinogen: In Dub )

I've also found interesting information in some songs, for what its worth, Shakta - Brainwash nation. I'd guess they're trying to say the reason movies are entertaining is our minds belive its real.