Here is another thumbs up for Dave Copley’s flutes. 
I have a Delrin D with the rounded rectangle embouchure, a Delrin F with the elliptical embouchure, and a blackwood D with the elliptical embouchure. All are excellent flutes, very easy to play, good tuning, tone and volume, and a good strong bell note. I prefer the elliptical embouchure to the rounded rectangle, so I’d suggest going that way if you get a Copley.
Jon
Dave Copley recommended the modern cut for my delrin and the elliptical for my D and E flat blackwood flutes. He told me that the difference in the materials was the reason why. I think some people really like the elliptical delrin, but I followed his advice and have been very happy with the results. I have no problem going from one to the other.
Di Mauro Delrin flute it’s the best I’ve ever tried…
Totally off the C&F radar, but my Fabio Di Natale synthetic R&R is the cat’s meow. Mine is voiced in a more baroque fashion, with smaller tone holes and a flexible nuanced sound, though I think his oval embouchure would be more interesting some.
http://www.fabiodinatale.com/en/classici-08.html
I also have a real original Hawkes ebonite flute that I bought from a member here, that is sort of the opposite thing. Huge holes, huge sound, and surprisingly well in tune. Not to mention, while expensive for most ordinary 1880s flutes, also cheap compared to a brand new version. That’s assuming you need keys, which I do on a large holed flute.
Price? Videos? 