WordPress does not support a template file which queries custom fields. You can reference the template file hierarchy.
One option would be to make a page for the news archive and a custom page for the press review archive. From these pages you could make custom template files to override the page:
page-press-reviews.php
page-news.php
These pages could leverage the query code you’ve already written. Unfortunately the default template tags to link to these pages won’t work but you can link directly to these individual pages.
It’s a little bit of a hack but it’ll get you there.