I will try to find a S5 then , thanks guys 

Why when four s-3's should be cheaper and make more money for you?
Really? how and where, are you accounting also for the psu?
you are in europe. so I assume you are using 220 volt power.
4 s-3's are about 400 to 440 euros.
and the server psu that does up to 2880 watts is under 200 euros.
I will find the link
Cheapest I can find for 4 s-3's is around 800 eur
could be since I can find usa ones one ebay and price has gone up. I got my last 2 for 85 usd shipped they are now over 140 shipped
http://www.ebay.com/itm/Bitmine-Antminer-S3-never-overclocked-ASIC-Bitcoin-441-GH-s-SHA-256-/301707363703?hash=item463f290577
below is european seller of 2880watt server psu.
https://bitcointalk.org/index.php?topic=738527.0
now I went to ebay uk and found the antminer s-3
http://www.ebay.co.uk/itm/ANTMINER-S3-Virtual-Currency-Miner-BitCoin-SHA-256-366W-ASIC-Miner-/371410014463?hash=item5679c310ff
he wants 167 usd shipping included 4x that is 660 usd
but since you may not be in the uk maybe your 200 euro each price is correct
good luck finding a good price. I wish I could be more helpful but all my sources would be usa based.
damn, for my budgtet i might only be able to find 2 s-3's plus psu
