Take a look at Godox AD360. It's cheap and powerful.
If you want 100% quality and support - go with Canon.
If you need more power, and same exceptional quality and support as Canon's - Profoto B2. Mounted on a ProMediaGear BBX or BBXL (my choice) it's an awesome system. With a 5" stud you can easily mount a 2' modifier like their OCF beauty dish w/diffuser.