Go for the Milliagan...my guess is you'll love it!

I have a four Milligan whistles including a Diamond Wood A. All great playing instruments.
The A is rapidly becoming one of my favorite whistles. I play with a flute and harp player who doubles on Alto flute. The A whistle and Alto flute are fantastic together.
Check out Flook's
Wrong Foot Forward Alto flute, and I'm pretty sure A whistle.
Gene used to offer a return policy if you didn't like the whistle, don't know if he still does, but his customer service is as good as it gets.