I have a mix of real and silk plants in my tank. I've had bad luck with live plants that I buy from the pet stores, so I bought aquatic plant bulbs instead of the adult plants, and have had loads of success. I just plopped them in and use plant tabs. They are great.
If you don't want live plants (the SDs will devour most types), I recommend silk plants. I am against plastic plants because they are dangerous. There is nothing soft about a plastic plant, and they usually have pointy or sharp edges that I think would be painful to swim in or around - I know I would hate them if I were a fish! Plus, one time I found one of my upside down catfish dead in a plastic plant. It had swam between the leaves, and got stuck because it was the type that had the sharp leaves that point up, so it acted like a cage and trapped my little fish.
So go with either live or silk. With SDs, I think silk is the best way to go. I don't know of any company names, but they are common, the same price as plastic plants, safer, and they look a LOT more realistic. And, your SDs won't eat them.