What vape should I get? Budget: 230 MAX if its really worth it, but I'd love to spend only like 150 ish....

Want: Efficiency. I really dont care about battery, I just want to get the most high off the smallest amount of weed. Also, I live in a dorm so I hope it can not be too smelly but I can get over that.

Environment: I dont need it to be stealthy, but i hope its pocket-able and not to strong of smell.

I'm probably going to be using this solo and with groups of like 5 ish, not going to be using at big parties or anything. 

Thanks!