if your looking to buy or download some look out for artists - Infected mushroom, pigs in space, Astral projection.

psy trance is a lot deeper then hard trance in its sound and a lot more synthetic sounding with strange sounds and effects making up a lot of the layers.

i do recommend listening to some stuff as i have come across some really good music in the genre but dont ecpct the big catchy hooks and riffs you find in hard trance, its a lot more subdued and spacey.