i've been to a local shop and asked about the flashes...
they told me that the best option would be a FL-36R ( also moneywise)
the FL-50 is a Prof flash and the 36 a more alround
i dont know it but the guy who told me this story it does make sense to me
any other opinions are very welcome !
What are you going to be using the flash for work-wise? The Metz 48 is in a similar price range to the FL-36R and numerous people have said the Metz is better. I would recommend you to go for the Metz.