My first question to you is do you understand ohms law and battery safety? Have you done your research on both topics? That is the most important thing with a mech. My first mech mod was a Nemesis which is a good one. I have had a few but a good Stingray X clone is always a favorite for most people and mine as well. Try to get a infinite clone if you can. The Fuhattan, SMPL, Cartel, Panzers are good as well. It all comes down to preference as to whether you want SS, Copper, Voltage drops etc.