I love my mechs, they're alot of fun when you build them right, and nothing quite vapes the same.
I have my white Mutation X v4 Mini married to my white Stingray X, they just go together perfectly (Stingray is pretty similar to the Nemmy, almost identical in design and function)
And I got my Derringer on my Copper Fuhattan V2, button throw is AMAZING!!!! (only annoying thing is the magnets are so strong I'm forever picking up small metal things off my table everytime I pick it up lol)
Both mechs can be had for less than $30, and are readily available in a variety of colors to suit your taste.