What mod and batteries should I pair with my limitless gold?

I'm using my alien 85s and vtc6 battery currently which means I'm limited to about 50W if I understand correctly, which is a good wattage for me. I'd like to go to a dual battery set up now though for longer life. My coils are about .2. I would like something that displays amps, volts, watts without having to cycle through a menu like the alien does. I would even do a 3 battery if it wasn't excessively large. Good ergonomics and appearance is fairly important to me. I was looking at the Predator but I have heard not so good things about the maker and that's my general problem is knowing which device makers are top quality. I'm also wondering which batteries would be best for this set up. .2 at 50-60w.