I like the basic Java fern, Java Moss, Guppy Grass, and Valessnaria. Putting plants in a tank while it is cycling will speed up the cycle, which is a good thing.
How many neon tetras are you planning on having? The larger number in the school of them the safer and more comfortable they feel.
The way to avoid snail infestations is to rinse the plants in tank-temperature water in a sink or some such quite well before you put them in the tank. They also sell chemicals that kill snails and snail eggs that you could dip the plants in, someone else will have to tell you what they are though. I don't use chemicals unless absolutely necessary, and for that reason never have used the snail killer one.
Good luck.