Ok so I went over your list here. These are my opinions for the most part written in red.
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The Aquarium
Turban snail: $2.49 (ok snails)
Blue leg hermit: $2.99 (they LOVE to take shells from snails)
Mexican turbo snail: $3.49 (great algae eating snails, can get big and bulldoze rocks/corals)
Red tip hermit crab: $2.99 (don't trust them one bit)
Zebra reef hermit: $2.99 (cool hermits but never owned one)
Emerald crab: $8.99 (don't trust them one bit)
Bumblebee snail: $2.99 YES! No other snails. (fantastic snails to have in a CUC, and yes they are compatible with other snails. I have a small army of these. They stay small and can get into the nooks and crannies)
Arrow crab: $15.99 too big Cerith snail: $1.99
Na (great snails to add to the CUC)(don't trust them, too big)
Scarlet hermit crab: $4.99 YES (the ONLY hermits I trust!)
Purple fire fish: $45.99 yes (very pretty and perfect for a small tank)
Cleaner shrimp: $24.99 yes (they are shrimp, they clean, and you are already set on it!)
Pencil urchin: $7.99 NOT REEF COM (don't trust them)
Rainford's goby: $24.99 yes (awesome fish but I wouldn't recommend)
Flame scallop: $9.99 NO TOO HARD (difficult to keep for a long period)
Scooter blenny: $15.99 too big
(not really too big, but they are a dragonet not a blenny so their main food source is pods. would not recommend to any beginner)
Neon goby: $25.99 yes (good little nano fish)
Red head goby: $39.99 yes (not sure on the size they grow too)
Sexy shrimp: $19.99 yes (very small, very ornamental, very comical, can be food!)
Pom Pom crab $24.99 (pretty cool crabs)
Aquatic Marine
Stock:
Halloween hermit: $14.99 (too big)
Bumblebee snail: $1.99 (same as above)
Court jester! $29.99 (same things as Rainfordi Goby)
Crinoid crab $25.99 (don't know much about them but they might work pretty good for a nano tank.)
Molly miller blenny$19.99 (too big)
Scarlet hermit: $5.99 (same as above)
Dragon face pipefish: $26.99 (not for beginners)
*tiger pistol shrimp: $29.99 (would work good with a goby)
Red banded pistol shrimp: $24.99 (would work good with a goby)
Scooter dragonet(CUTE!) $14.99 (same as scooter blenny)
Red fire fish: $14.99 (pretty and great nano fish)
Cleaner shrimp: $32.99 (same as above)
**Arrow crab: $19.99 (same as above)
Nassarius snail: $2.99 (my favorite snails for a sandbed. Great member of a CUC)
Chocolate chip starfish: $10.99 (eat coral, not reef safe!)
**Coral banded shrimp: $14.99 (can be aggressive)
Emerald crab: $9.99 (same as above)
Zebra mantis shrimp: $89.99 (Maybe one day

)
(if that's the only thing you want!!!)