One whistle what would it be? If you didn’t have to worry about the waiting list or the price or anything like that …if poof you could just have whatever whistle by whatever maker in whatever key you wanted. What would it be? and lets just to be concise say no extra tubes or anything so just the single whistle in a single key and you couldn’t have any other’s EVER 
.
I likes my elfsong bunches. 
Burke WWB in D
burke low D EZ composite 
Burke AlPro D.
Ok, do you mean just one more whistle, in addition to those we already have, or the proverbial “if you could only take one whistle to an island for the rest of your life” whistle? If the former, a Copeland C; if the latter, my Copeland soprano nickel D.
Regards,
PhilO
Today: Wilson blackwood in D (the only wood/key he ever made). AFAIK, these are no longer available. The first batch was incredible, but it appears as though the quality went down really fast and he stopped making them.
90% of the time I would probably say thin Weasel in D.
Of those I don’t have, Grinter low-F.
Sindt D
There was this unusually good Copeland Nickel C I sold once…but I’ll never get that back, so I’d choose an Overton Low F - I just love that whistle, and love that key; not too high, not too low.
Loren
Something wide, with big fingerholes, not too loud or shrill, key of D with an extra C hole at the bottom, strong lower octave, smooth easily transitioning upper octave, very responsive, full rich tone, preferably not brass, and under $10. 
This is a really tough question. Now give me about 10 whistles and I’d still have problems choosing. OK: Grinter low F.
If a nice wooden whistle like that were the only one I could own, I’d constantly be worried about someone sitting on it, or knocking it off a table, or…well you get the idea.
So, I’d want something that could be hammered back into shape, hee hee.
Loren
Funny I was going to vote the same. But yours and mine are sister-ships, too. Of all my whistles, this Grinter low F is the most balanced, in every sense of the term. So, if I had to keep but one, it would be it.
It’s kind of delicate, but the PVC (plumbing tube) case I felt I had to build for it takes over the pub bludgeon function. 
And this eventhough I just cashed big bobs for something more versatile though in F and in wood (it’s a mixed construction 
)too. We’ll see if I was right on this hunch when it comes in.
Well reading your response and Loren’s I think I have a solution to our problem. Let’s just find a desert island big enough for about 100 people and agree to each vote for something different. But, hey, will somebody out there vote for something other than a low F please? And lets bring along a good dentist and plenty of mouthwash. 
Cooperman
Only one? 
I guess that would have to be my Clarke original design in D, but I would really miss my Burke AL-PRO low D. 
Burke Brass Session D
I like my Hoover Bb aluminum and C conical skipole an awful lot, but for one I’d have to go with a soprano D. That would be my Sweetheart Professional in laminate, for it’s strong open tone, great balance and response, and also easy care. Buut… I saw yesterday on the Sweetheart website that they now offer the Professional in blackwood (for $90 more than the laminate!). But, no, nothing on spec. Professional laminate it is.
My old Clarke original C. I could part with everything else if I had to.
A flute. 
Sonja