Cardinal Shrimp, Dwarf Crayfish, Harlequin Shrimp Or Crystal Reds...

Greetings, Fishlore!
I come here to ask for opinions: Which of these for invertebrates should I get?

TLDR: Private shrimp importer PMed me the other day, these 4 can be ordered till March 24, dunno what to get

Long version: A private shrimp importer contacted me through Facebook a week ago, after posting at a local hobbyist group as I was looking for someone to order some exotic stuff from. He can order quite a few things, but I narrowed my choices to these four. And as much as possible, I want to bulk order (10+) because he gives a discount on these numbers. I want your thoughts on what I should get.
I'm on a limited budget, that's why I can't bulk order everything.
So, will it be:
10 Cardinal Shrimp
10 Crystal Red Shrimp
5 Dwarf Crayfish
or 5 Harlequin Shrimp?
Please tell me why too, while I am really old with invertebrate keeping, and seeing how I kept everything here before except the Harlequin Shrimp, experience isn't a problem. Oh, and they will be going in a new 35 Gallon tank that has been in a 2 month cycle with mosses and plants on with a pH of 7.00, will change if going for CRS or Cardinals/Harlequins.

 

I'd vote the harlequins since you haven't kept them before and they look amazing!

 

Aren't Harlequin Shrimp saltwater?

 

Aren't Harlequin Shrimp saltwater?

I think so, yes.

 

The Harlequin Shrimp I'm referring to are the , a relative of Caridina Dennerli

 

Ah ok. That still looks really interesting!

 

Thanks for the clarification! I was kind of confused when you listed them. They're very pretty by the way.