I would recommend LiteCigUSA.net for a less expensive kit but someone said lately that they were selling KR8 batteries without the gold button and with their logo on them that were not as good.
I recommend manuals. Most people here use and recommend manuals.
V4L vs SmokelessImage
V4L - 3.7v, the hottest cartos (the WOW ones), and between those cartos and their WOW juices, more hit. Their manuals still have a hole but seem to be mostly sealed inside. their button is normal size. 280mah for the standard size which is the size I recommend
SmokelessImage - 3.6v, if their cartos are the same as Bloogplanet then they have a smoother less hot drag (their coil is near the threaded end of the carto) so less hit but it's an easier drag so you may get a bigger drag more easily. Rubberized finish, manuals available in some colors. They claim more battery life (for the standard 78mm battery size that is 320mah instead of 280mah) and these make 120mm ecig just like the V4: standard. The manual button is tiny and partially recessed and a bit harder to press.
Keep in mined that you can use either's cartos on either one.