Study bioinformatics is like being jack of all trade so it is important you choose where it will be good backup of computer science, and natural science infrastructure and faculty. Especially having a good teachers in computer science is indispensible.
Few places in Europe where good (and @some places no tution fees) master bioinformatics courses and recommended are:
http://onderwijsaanbod.kuleuven.be/opleidingen/e/CQ_50269018.htm
http://www.binf.ku.dk/programmes/Master
http://www.cs.helsinki.fi/en/mbi/
http://www.nbic.nl/education/msc-programmes/
