Get a 303 for some seriouse trip
If you want some trippy sounds then get a 303 some rather high punchy and snappy drums and a Psy-trance like bass line. Trippy is more on the sound FX Side more than bizarre synthesizer choice. Listen to some Psy-Trance (try Di.FM) and take a listen to some :]
It's a little dry and all the synths go with each other, start with some chords and build from there, there is also a high pitched whine on the arp synth that hurts my ears.