I prefer them a bit tight - Worth brown, or Aquila red. Del Rey has Kala Pearls on both her resonators. NRP used to recommend Guadaloupe strings. Pearls and Guadaloupe are both wound sets, be careful NOT to trim them because they' start unravelling.
Good cones, like the one Steve Evans uses, can take some tension, and can even be 'popped' back when things go wrong. I'd be more careful with string tension on the cheapest cones though.