I love the eGo 2.4 ml CC (changeable coil) clearomizers! They give the closest to the true flavor of the e-juices next to dripping. You don't have to buy a whole clearo when it no longer produces vapor like it did before -- you just change the inside coil (unscrew the tip/mouth piece, unscrew the coil, pop a new one in, replace the tip) and you're good to go. The coils come in a five pack that are much cheaper than to buy the whole thing. AND! It holds a whopping 2.4 ml of liquid so you don't have to mess with things so often. They're also very easy to clean and reuse.
You can't go wrong by buying from The Veteran Vapor. The customer service there is excellent and Brian is very knowledgeable about all of his products.