I much preferred Ikenvape cartos.  I'd use SMOKtech if IKV were not available.  I hated Boges; their polyfill was packed too tightly.
Ikenvape cartos were highly sought after, and often were out of stock.  You could sign up for an e-mail alert when they came back into stock, and everyone who used IKV cartos would message all their friends, "Ikenvape cartos are in stock!".  They'd all be gone within a few days time if you didn't jump.
Rumor had it that Ikenvape commissioned Boge to make his cartos to his higher specification standards:  higher grade polyfill, higher grade 
coils, larger laser-drilled holes, etc.
Anyone use IBTanked cartotanks?
 (this image courtesy of @The Ocelot)