for taste, flavor, ease of use, quality build, etc the deltas and their coils are the best tank system going right now they make a 16, 19 and 23mm tanks that blow away aspire or kanger IMHO. their coils are amazing-i have never had a bad one(can't say that about aspire or kanger) and they last much longer than those others. their triple bottom coil is designed to be vaped at higher watts to take advantage of all the higher powered mods in the market. their airflow is better designed and works better. sweet-vapes or any joyetech dealer should have them and they are definitely worth a try....