Hi, Ebyrd23. Welcome to ECF. I love my high wattage mod, and it sounds making the switch to a high wattage regulated mod would be a great choice for you. There are a lot of them out there at the moment, and most of the better known ones are pretty great. Do you have a budget range? Would you rather have one battery or two? Is the new temperature thing from Evolv more interesting to you than the ability to run hotter than 40 watts?
As far as your other questions, anything with a genuine YiHi or Evolv chip is going to be an excellent choice, although I probably wouldn't trust my safety to anything else. And usually, you're going to want to build higher resistance just because you can - if you've got 8 or 9 volts you can push through it, you can get a bigger surface area out of a bigger coil, which means more or better vapor. But most of them have a maximum voltage, so if you build too high, you can lock yourself out of the higher power ranges. For example, my single battery device goes up to 60 watts, but has a maximum voltage of 9.5. When I had a 1.75 ohm coil on it, I couldn't go any higher than 51.5 watts, because it wouldn't put out more than 9.5 volts. Now I've got a 1.3 on there, so I can use the full range. Some of the higher powered ones have pretty tight restrictions on that max. The IPV3, for example, won't go over 8.5 volts, so to pull its 150 watt max, you need a coil thats under .48 ohms. The lowest build it will fire is .1.
Wattage is totally going to depend on your build. I like my 24awg, 8 wraps on 1/8', 1.3 ohm tank build at 22.5 watts or so most of the time. On a dual, I'll be more in the 40ish range. Flavor dripping is anywhere from 20 up depending on the airflow I'm feeling at the moment. And for a cloud chasing dripper build, it's more about "how high can you handle it before the vape's too hot or harsh?"
One more thing... you said you can't find the taste you like in a tank, even the atlantis. Get yourself a Lemo. You'll find it there. And then you've got a tank for times when dripping is inconvenient, like driving.
tl;dr: The best one for you depends on budget and the features you want. Generally, yes, higher resistance because it's a better vape. Wattage depends. Buy a Lemo.