Ive been using Madvapes.com for my Hardware, batts, atty's etc.... Great prices in comparison to some ive seen. Excellently fast shipping. Customer service is top notch in regards to an issue with a batt i had. As far as juice selection, they have a pretty nice varity, though at the time im writing this... the majority of their selection is out of stock.... aside from that, id like to see them carry more 36mg flavors and larger bottles as well.
Ive also got a sampler pack on the way from Bombdropsvapor.com ... they have fanstastic selection of both 100% VG and 100% PG and combos of the two inbetween. As far as juice taste, i cannot attest to that just yet. If the juices are as good as some of the reviews ive read on ECF for them... i will more than likely choose them as my primary juice vendor.
Think i might place an order from Ms. T's to give them a try also. I have also read good things about DIYflavorshack.com
Edited: I now have orders placed with DIYflavorshack.com , off the rip i can tell you dawn is awesome. I had an email confirmation about 3mins after the order was placed, and not just an auto responder email... it was Dawn.