My favourite mech is actually a cheap, authentic mech- the Wotofo Phantom, paired with a Wotofo Lush RDA.
I use the standard 510 connection, not the Hyrbrid top, but out of all my mechs it is by far my favourite performer. Nice finish, copper, mine is white coated, rhodium plated contacts that are easy to clean, soft and hard spring ( I use the soft spring, the hard one is VERY stiff, but I guess good if you wanted to take the mod out so it won't fire in your pocket).
It only costs around £25 too, which I think is very cheap for an authentic mech that performs really well.
Saying this though, I do much prefer my regulated mods. Mechs are fun from time to time, but a regulated mod suits my vaping style much better.