Buu has great category but the unit is underwhelming (also I really like the TEQ Super Buu healer and they have the same name). Even if you blow your stones on Broly/Gogeta, you should save up nice amount for GLB 4th anniversary.He'd be a cool unit to pull on during some down time, but no one is even gonna think about it knowing the Movies are near.
Although, people are kinda hyping the 4th anniversary, so maybe it's better to save for the summer (lol)
AGL Metal Cooler looks great and I really like Frieza units, so that might be my next stop.