depends on what kind of metal you are looking for:
Have a look at the Komplex 457 ,Kofmehl (Solothurn) or an Starticket or Ticketcorner Websites.
I like Metalcore or Hardcore, so I going to see Killswitch Engange, Trivium, Miss May I and Battlecross in Brixton Academy Feb 02nd 2014 and Hatebreed, Napalm Death in Linz, Austria , Feb 24th 2014.
Have a look for the Festivals in France (Hellfest), Belgium (Graspop) or Germany
(With Full Force) or Switzerland (Greenfield) as well.
Adept will play Dec 12th 2013 in the Kofmehl Solothurn
Lamb of God Jan 08th 2014 Komplex 457 Zurich
Persistance Tour 2014 jan 22 nd 2014 Komplex 457
Bullet for my Valentine, Callejon and While she Sleeps Feb 12 th 2014 Komplex 457
Five Finger Death Punch Mar 19 Th Komplex 457
In the Z 7 at Prattlen there are Sepultura, Iced Earth, Kataklysm to name a few http://www.z-7.ch/konzertkalender.php