erm if i had the room, id go with a trio of motoros. ive heard retics can be hard to keep, especially when smaller. histrixs i love, but cant find one. i think they are a bit more sensitive than motoros, and are smooth skinned, but they have a smaller max size, similar to the retics. i'd read the stickies in the ray bit and do a bit more research on them, you'll be able to make a more informed descision then