RX200 is my recommendation for a lot of power for not a lot of money. 250W with the update, SS316L, Titanium G1 and Nickel 200 TC built in, three custom TCR modes plus 1-200 (250 with update) watt power mode. Triple 18650, seen them as low as $39.99. Only problem is the 510 pin is liable to get stunted out if you use a device with a longer 510 pin.
Then there's the Cuboid, which I call the little brother to the RX200.
Evidently there's now an iStick200W, which is also triple 18650. I'm pretty sure it's the same RX200 chip in a wider mod. Joyetech seems to love stuffing the same board into different mods.
I can't recommend IPV's due to their iffy history, but the IPV5 is a cheap option.
The Laismo G series are all 200W, ranging from higher quality touch screen down to basic 200W.
Then the Kooper Plus 200W and Primus 300W.
The Fuchai 200W and Sigelei TS 150TC
Hell, 200W mods are a dime a dozen now, and now you have 250 and 300W mods. Oh, China.
Then you have the Tesla 200W, which is also iffy.
High wattage just gives you headroom, even if you don't use it the battery life and options still exist. Just remember you're not going to get more than like 165W true wattage out of any dual 18650 mod, anything over 150W on dual 18650 is done by PWM or rapid charge/discharge capacitor setups.