I completely understand your desire to move into mechanical mods. While I love my VV mod, there is something about the feel of a mech mod that just screams class. With that in mind, the Nemesis clones are a very popular choice. I don't own one, but from what I've read, they do what is expected out of a mech mod, and with the right upgrades, you'll get a very respectable voltage drop. However, the problems that people have talked about are going to present a learning curve for you. I know with my first mech mod, a Chi You clone, it took me a while to get the adjustable contacts right before there was no battery rattle. Then I unscrewed it to change my
batteries a few times, and my fire button loosened up. The Neme has a similar set up and you'll just need to be aware of those things.
If you wanted to get into mech mods, I'd actually recommend a Stingray clone. It already comes with magnets. It uses a floating adjustable 510 connection pin and the adjustment for battery rattle seems easier to use than the Nemesis. It also comes in sexy copper

The price is usually a bit more expensive than the Nemesis, but you'll save on not having to get the extra magnets for an upgrade.
Also, just my personal opinion, but for my all day attys that are above 1.1 ohms, I prefer to vape them on a VV mod. I only use my mechs for RDA's that are built sub-ohm and then only when I'm at home or going to a vape store. The reason is I usually use the VV mod for is because I like a consistent vape. While the mech mod's 4.2 to 3.7 is in your range of preferred voltage, the shift from 4.2 to a 3.7 vape is a very noticeable shift. I'd rather have the constant voltage and just change batteries when it starts to flash red, rather than taste the diminishing vape on my all day vape. On my mechs, I change the battery after no more than an hours' worth of vape to keep it as fresh as possible. If I throw that battery on a multimeter, it still reads about 3.9v, but I can taste the drop.