Great topic! It is a little hard for me to classify "best", as my favorite changes from week to week... and I am both mouth-to-lung and direct-lung vaper.
My best for the past couple of weeks so far are:
Best Battery - LG HG2 and Samsung 25R (I vape from 18W to 90W and everythng in between) for reliability, performance and price point.
Best Mods
Kangertech KBOX(1st version)for my out and about mod.
Wismec Realeaux RX200 for battery life, power range, and TC function - used mainly at home and in the office.
Best Tank
Tube RTA (Limelight) deck with Kayfun V4 tank and chimney for a slighlty airier MTL experience, and one of my top flavor tanks.
Steam Crave Aromamizer RTDA for my lung hitter. Great in both flavor and vapor production.
Best Starter Kit - I cannot recommend what I used. haha But if it were available when I started, or now just starting vaping I'd go with a Kangertech Subtank mini, and Joyetech evic VTC mini combo for it's versatility, affordability, and proven track record.