Valdivia or Concepción?

This summer I would like to visit the south of Chile and visit places like Concepción, Puerto Montt, Valdivia or Chiloé. It is difficult for this to happen, because you probably have to work all summer and can not enjoy the beach and the "magical" landscapes of the south.

I would like to go south because I know some places and it seems very nice and peaceful. In previous years I visited Puerto Montt and Chiloé and I loved the two places. Concepcion is a historic city, so I would like to know it. I do not have relatives there, but I have a couple of friends who could meet me at home. I do not have any friends in Valdivia, so it's harder to get lodging, but the scenery and attractions in the area should be worth it.

These two areas are highly tourist in summer, so the price of travel would be high, but it would be worth it. There are different activities that can be done, mainly in Valdivia could know the German architecture, the "Valdivian jungle" and meet the business that produce beer. In Concepción I would like to know the center and the Ester Roa Rebolledo stadium. Also, in Concepción, he would take advantage to meet Talcahuano and tasting the different products of the sea.

I would like to go with friends to this trip. I usually travel with my family in winter, so in the summer I would like to enjoy new experiences with my friends and I think this trip could be ideal.