The "BEST" of anything is what works for you to keep you from smoking. With that said I have over 100 different atomizers and there have been a couple improvements this year worth noting.
Without a doubt the SMOK Guardian III kit is definitely recommended for either beginners or advanced users. Click the link to read all about it. Honorable mention to the Joyetech Elitar.
Unfortunates and what not to look for:
All the information contained in these pages are only the opinions of the author and the author is not an expert at anything.