Which Beys are worth your time and money?

I see all these beys on the internet that are expensive. Which ones are worth buying?
Cause you can only get some beys in places like Hong-Kong or Japan. ARE THEY REALLY WORTH IT?
plastic:
trygle
grip attacker
dragoon s
etc

hms:
dragoon ms
dragoon msuv
wolborg ms
dark effigy ms
etc

MFB:
lightning ldrago 100hf
dont really know any others. im not a expert at mfb or plastics XD
http://worldbeyblade.org/Thread-What-to-Buy-in-MFB