I've used many strings on my NH F-30R, and so far the roster includes the following.
- D'adarrio's: EXP16 & Nickel Bronze
- Ernie Ball: Earthworks & Aluminum Bronze
- Martin's: Monel's, Lawrence Jubber's, Tommy Emmanual's, Cleartone versions, and finally the Titanium's
- Elixir: Light's in Phosphor Bronze and 80/20, and the HD Light versions in both as well
- John Pearse: Silk & Bronze
I'm really happy with my F-30R, and at the end of the day the core sound of my guitar always came through no matter what I tried, although there were some differences as expected.
For the loudest, thickest, and surprisingly deepest sound with the most overtones the Elixir HD Lights in Phosphor Bronze worked the best for me. They seemed louder, and a little crisper during the first two weeks, but the extra tension really accentuated the bass. They settled in and retained a good full sound much longer than anything else non-coated or coated. However, since they have more tension, they were a little less comfortable to play compared to the tension on regular light strings, so I would simply suggest a great low set-up to make these work best. I have these on my guitar now, and I have a very light touch and my action is below spec.
The easiest to play were the Martin Titaniums and they seemed to create more of a fundamental tone. I guess most nickel strings might do this, but the Martins did it without being to jangly or bright. They are crazy expensive so I've only run one set, but I would use them again simply because how good they felt, I liked the tone, and they lasted a long time.
Today my experimental string binge is over and I've found options I'm happy with, so I just put on a set and play them until I think they're dead. Going forward I'll buy D-addario EXP's, Elixir HD Lights, and Martin Titaniums, but swap them around from time-to-time for a little change of pace.