Meanwhile, for anyone else considering a treble, here's a long reply from another poster with all sorts of excellent advice--
I can offer you my experience with treble flutes. (No, you didn't ask but I'm doing this for the benefit of anyone who may be lured by those sweet-sounding suckers. LOL)
At one time I owned three of them, all by different makers: Emerson, Belleisle (Asian-made, Irish-marketed) and Guo.
I sold them all.
The Emerson sounded the best, had a silver head and body, but had (I kid you not) a G# key turned backwards. (The curve was away from the left hand, not towards it!). The D# key was in line with all of the other keys and not adjustable. Just horrible, ergonomically.
The Belleisle was the most comfortable to hold but the headjoint cut was so resistant I actually sent it to Weissman flutes in NYC to be re-cut. It helped, but the flute overall wasn't that great an instrument.
The Guo had the most responsive headjoint; practically identical to the Pearl composite piccolo headjoint. It could reach highest C (as fingered) with no effort. But the keywork was so cramped in the right hand (particularly the "footjoint" keys) that I finally gave up.
First, consider just how many opportunities you may have to play the instrument. I didn't ask myself that question. I simply thought it would be cool to have a treble flute. Even flute choir literature doesn't often have treble flute parts.
Admittedly, a good treble flute has a sweet sound that is reminiscent of what you hear in the "Titanic" soundtrack. But again, its use in modern literature is limited. And trying to sell a treble flute can be challenging because again, they have limited use in American ensembles. (In the UK they march with them and have a merry old time!)
If you have small hands, I would recommend the Guo. It was the most affordable of the three treble flutes I owned and overall a good value.
If you can afford it, go with the Grenaditte (G-301) model because it has a sweeter sound and the headjoint has (in my opinion) a better cut.
The New Voice version is less expensive and has a sound closer to a metal flute.
Another important difference between the two models is the "shelf" below the G# key. The New Voice shelf sticks out beyond the key and that can drive some people crazy.
Good luck and I hope you find an instrument that fits both your hands and your musical needs.
Flutes:1975 Gemeinhardt M2 in chrome nickel;1982 Armstrong 80;2006 Yamaha 584
Piccs:1978 Artley piece of crap 15 P;1982 Gemeinhardt 4S;1980s? Armstrong all wood (no model)
Bass:2006 Jupiter di Medici G0199
Treble:20?? Guo New Voice
+ many flute-cousins