That's a lovely image; I can see why you want an excellent print. But I agree with other posters; when your image is low key and greatly dependent upon shadow density and rich blacks, you'll be better off printing it on a glossier paper that yields a deep D-max. Matte or cotton rag papers are great for airy, high-key photographs. Richard Lohmann's and Tyler Boley's landscapes come to mind. But the lack of rich shadows on such papers will kill the impact of photographs like yours.
One 'cheat' that can resurrect lost shadow detail is described by Uwe Steinmueller in his Fine Art Digital Printing book. You print out a test file with grey squares running from levels 0 to 255 on your preferrred printer with the paper and profile you want to use. Then check to see the darkest square you can just distinquish from the previous square. More often than not, on cotton rag paper even with a decent profile the last 5, 7, even 12 levels go straight to d-max with no detail. Sometimes there's even a density reversal, where the squares start going a tiny bit lighter due to excessive inkload. Once you've figured out the last usable level, you apply a levels adjustment layer that limits the shadow output density to that level. You may of course have to use another curves layer to re-jigger the midtone contrast, but this cheat has rescued prints for me. In a perfect world, the profile and black point compensation would reliably correct this on their own, but we don't live in that world.
