I'd go for a Spinner over a Twist - easier to read the settings, about the same size and the same price point for slightly higher capacity.
I've had good luck with "stardust" style clearos, easy to fill, easy to clean and easy to replace the coil when needed.
Or cartos - I've use Boge, Vision and Smoov, and all work well. Cartos do seem to give a better vape on fixed voltage batteries (I personally like 2 ohm on 3.7 volts, but if you go with any of the vv (variable voltage) batts, that's inconsequential.
Although the 650 eGos do work well - they're what I started with and are now my backups.
I get a worry free couple of days off a 1300 Spinner, vaping about 3 to 4 ml a day in clearos. Of course, ymmv.
(And just picked up an Innokin MVP, with 2600 mAh. Nifty little unit if you like box configurations.)