I will wait s6 and after buy from amazon
You have to realize that there is no official announcement in regards to the S6 (at least not one that I'm aware of).
Even if they release the S6 that still means that in about a year your miner will be mostly obsolete. Technology is improving and the miners are constantly becoming more efficient.
yet if isn't release the s6 .
then what will do i ?
probably better s5 buy.
i think s5 more anyway will be profitable in future