Sexy Shrimp

I'm thinking of acquiring a small group of these guys, I heard that they do better in odd number groups of 3 or 5.. i'm thinking of getting 3 of these guys as my LFS just got them in last night.. I want to put it into my 75G though, was wondering if that was a bad idea? I have 2 Harlequin Shrimps and 2 Cleaner shrimps, was wondering if they would get picked on by the cleaner shrimps..? anyone have any experience with them?
Or I have a acrylic divider that I can set up and put in my 75G and put these guys in the acrylic divider which measures about 12x3x8.. what you guys think?

 

I always thought that it would be cool to set up a little sanctuary for sexy shrimp, maybe even a pico.....just tagging along.

 

I highly doubt they would be picked on by cleaners. They are pretty docile. I used to have peppermints that scared my cleaner I think you would be OK as long as you made sure there is enough food to go around for everyone