Just had to add to my earlier… You know how, sometimes, your flute just plain “works”? My M&E was doing that last night at session! I wish I knew what I was doing right! Also, we played a couple of tunes in C, so I really liked having the F-nat key - it seems to blend a little better than the F# 
Pat
Since you had good experience with the Sweets have you considered their 4 keyed wooden flute? I have one which I really enjoy and it is fully chromatic. Currently they are listed at $795 USD which converts to about 625 euros (to compare with the M&E price). I have not had experience with a M&E keyed, but used to play a keyless for a while and prefer the Sweet. Of course, in the end it is all about preferences.
I’ve played most of the flutes mentioned here, and have owned a 4 keyed rosewood Sweet flute and currently play a 6 key polymer M&E flute. I really like the M&E. Clunky keys, thick body, heavy…but very versatile and a nice session beast. They seem to me to play best with someone who wants to play them aggressively.
If you like your Sweet, though, I can highly recommend the 4 key Sweet flutes as well. I only sold mine because I was playing with a way out of tune box player and needed the larger tuning range of a flute with a full tuning slide. However, if you’re in tune with your maple flute, you’d be fine with the 4 keyed Sweet flute as well.
Eric