Gus core ,m mod s mod by aero ,super -T simplisity ,gp paps , nemesis high end yes but worth the $ IMO and for me the more I spend on budget mods it made me want hi end even more .you will get a good vape from a 20$ mod yes but you don't get the same smile it's like this drive a Kia or a Lexus ? What would make you smile more ?