If you have the space, I would also recommend going with a 5 gallon tank at least. More stable parameters.
It'll actually be a squeeze to get the 2.5s in tbh. I've been keeping tanks for...wow, it's really been 15+ years at this point. Anyways, I've been keeping shrimp for 10+ years, so I think I have enough experience to keep'em alive.
I think I'm learning towards getting "Fire Red" cherry shrimp, since the bloody mary's don't breed true, and I'd like to limit culling to very infrequently (>1 month between cullings).
As for the yellow shrimp, I had the "goldenback" variant show up in my "mixed" cherry tank (it was a mix of cherries all the way up to painted fire reds), and I can't really say I'm a fan. I'd rather get high quality yellows without the goldenback. And I'm staying faaaaaaaaar away from anything that's not Neocaridina heteropoda/davidii color morphs...
For the blues, I think high quality blue dreams is what I want. Blue Tigers (and OEBTs) are off the list because I'd really like to just have my shrimp in tap water.
If I decide to use RO/DI water + minerals, I'll definitely think about the yellow king kongs (they are
Now...what snails do I want, and what plants hehe....