OK, I’m up for that, Steve!
There has been some good advice given already, and it’s probably the general consensus around here to start on the high D, and get your feet wet with the playing first. But not everyone does it that way, as it’s not a standard course-it’s what you want and make of it. If you really want to play a low whistle, and can probably manage the stretch (consult your whistle maker), then go ahead and get one, if the low stuff really thrills you and keeps you interested. It will take some time to adjust to piper’s grip (many use it top and bottom, by the way-especially on the low D’s and below), but you can do it in time, and it will probably become second nature with practice. Personally, I started on a Shaw A, then very shortly went right to a low D without regret. I’ve picked up cheap high Ds here and there, but it doesn’t thrill me playing them like the lows do, and they probably never will.
But…your hands will tire quickly until you become accustomed to the big stretches, so, it’s a very good idea to have a higher whistle to play when your hands are tired from the low whistle. If you concentrate on the high, and fill in with the low on occasion, you will have the best of both. Who knows, you may also find you like the high D whistle better (many do), or even that the low D is too much for you, and sometimes a higher key low whistle (F, G, A or Bb for instance) is a better answer then-but you don’t know until you try the low D if you can do it or not-and if it’s what you really want.
The Domnahl na Gruen seems like it’s a nice whistle for the money, and with your location, a good safe bet to try out anyway and see how you get on with it. Seems the maker is open to helping you get what you want and need-that’s really good when you can find that.
You can always buy a bunch of cheap high Ds along the way and see what you like (most do anyway), but as some suggested a little higher grade whistle will make a better start-like a Dixon Trad or another like it. Yes, Bigwhistle.com is a good source for you especially since it’s in your backyard-and by the way, they have the Dixon Trad at the same price as the Ebay seller Davy listed. Personally, I’d go with a reputable whistle seller anyday who specializes in them like Big Whistle.
The main thing is to enjoy your playing time-so do whatever it takes to get there, and you’ll be fine. Have a blast!
Barry