I have an Alesis Turbo Mesh drum set and I am thinking about getting the Alesis Nitro Mesh drum set. Is the Nitro that much better than the Turbo? Is it worth it to upgrade? The main reason I am thinking about it is because the Turbo doesn't have that many kits and I don't especially like any of them that much, but I use headphones so maybe that's why they don't sound that good. Would it make more sense to buy an amp instead, or both?