Quick question, should Im from EU - should i mine at middlecoin.com or should i choose amsterdam/eu server to get better profits?
middlecoin.com will point you to the closest server to you (so probably am or eu).
I don't mine on eu for now (lower payouts), only on am or useast, but I have all of them in the cgminer conf so I can switch or load-balance/failover when needed.
You'll have to see which is better for you. My 290 rigs likes am better (cgwatcher 3.7.2 and the 13.11 drv), my 7970/280X like useast better (cgmner 3.1.0 and 12.8 drv).