I'll second Fractal Glider and, to an extent, Green Oms (Crinklewood Crickets is a great track), Logic Bomb and Saiko Pod, although the latter three are a little progressive for my full-time tastes. If you like that sound, though, Vibrasphere's Lime Structure is also good. Mr. Peculiar and Psycraft are decent if you like full-blown, if over-the-top, psychedelic mayhem (as opposed to a more pared-down, authentic Goa style).