A good wrap like from Jwrap can make a mod look even better than brand new. I've wrapped a few mods that the finish was fine on, but it just looked better with a wrap. Won't help you much if the battery door is janky.
I'm loath to usually recommend Wismec, but their new Sinuous 200, which I guess is their answer to the sometimes problematic Predator (the 510 falling out was sorta annoying) but the one thing they did change is center the 510, which IMO looks way better than to the side like the Predator. If it doesn't fall out, even better.
Other worthy choices as who can ever have too many mods would include the Smoant stuff like the Battlstar and Charon (with a touchscreen version to boot), as well as the new Vaporesso Revenger, which is getting good feedback too.