I recently asked a very similar question. You may want to read the responses I got on this thread:
http://chiffboard.mati.ca/viewtopic.php?t=18299
I ended up getting a Silkstone tunable D and I’m very happy with it. It cost $105 from the Whistleshop: see
http://www.thewhistleshop.com/catalog/whistles/highend/silkstone/silkston.htm
They have them in stock and ship right away, so there’s no wait.
Good luck! I hope you find the perfect whistle for you! 
Sarah
Geoman, whereabouts are you in SW Virginia? I live in northwest Forsyth Co., NC., not far from Surry and Stokes counties. Maybe we could meet at some intermediate location near the VA border, and you could try out my Burkes.
‘Geoman’ is an interesting name. You aren’t by any chance into geocaching, are you?
Sigh. I’m nearly 6 weeks into my 8-10 week queue in the Elf Song waiting list. Time goes sooooooo slowly. But I know it will be worth the wait.
Ridseard, I live in Botetourt Co, Va-- just outside Roanoke. Not exactly a location packed to the brim with whistlers, but we hold our own. 
I’ve never had a chance to do any geocaching, although I’ve seen it done and it looks pretty interesting(I’m sure crashing through the woods or whatnot with a GPS would be fun for anyone, lol).
The name comes from the fact that I’m a Geology major at Virginia Tech here in grand ole Blacksburg – home of the Hokies.
I’d be nice to find some other whistlers in this town though. 