I’ve been playing the flute FOREVER and I’m going to buy some whistles. I’m going to buy an original Clarke, but can’t decide between the Generation folk, walton’s little black D, or the Feadog. I’m going to buy one or two of those three, so what would you all recommend???
Hit your grand parents up for a few bucks and get 'em all. 
Personally, I’m a Clarke D fan, but some people hate them. You just have to find one that works for you. Good luck (and welcome to the board!)
Tom
I know lots of people will not agree with me, but I wouldn’t buy any of them. Uhg. They’re hard to play and they don’t sound good. And when you’re just starting, hard to play is not what you need. The Clarke is particularly bad, unless you’re good at reworking the thing. Okay, I can’t say that about the Little Black D because I don’t have one, but I have a Walton Mellow D and I don’t like it.
Look, compared to flutes, any whistle is a bargain. Do yourself a favor and get a decent one to begin with. On the low end of this low-priced instrument, you can get a tuneable Dixon for $25. Easy to play and plenty loud, although I prefer metal to plastic. Personally, my favorite is my Hoover Traditional Bore. Wonderful. Only $50 or $60. Or put out a measly $100 and get a Burke. Shoot, a Sindt is only $70 or so.
You’ve got much better options than Clark and Walton.
Hi…I am going to politely disagree with Tonya 
If you pick up a whistle and then after two or three months find you are NOT playing it wouldn’t it be better to Not be playing a $10 whistle rather than a $70 whistle? Then once you know whether or not you are going to stick with it, spend a little more.
I started with a Clarke Celtic Tinwhistle and am very happy with it…I was a bit lazy playing this morning though and ended up with notes from both octaves playing at the same time (yucky buzz noise) but when I corrected my posture and breathing this cleared up.
Next I picked up a Generation high G, which I bought unseen and was expecting the lower G but that was my mistake. I’m not particularly impressed by it but it has been great for learning on and I don’t mind if the kids get ahold of it!
Now that I know I am sticking with this instrument, I am patiently waiting for a 3 piece tunable set of Susatos and a PVC Hoover to arrive from across the border.
I am also a flutist who whistles and I know you’ll do great no matter what you decide to pick up!
Debbie
For my money (about $10.00 at The Whistle Shop) the Clarke Celtic Whistle is the easiest and most forgiving to play, especially for a beginner.
While many C&Fers don’t like the sound(I don’t for slow airs) it really is a good beginner whistle, and easy to carry around in your pocket for impromptu sessions.
Keith