i recently went on a long search for a flute in the $3K price range, and decided on the muramatsu EX. i suppose i differed from most in that i preferred it over the powell signature series.
luckily, here in dallas we have the carolyn nussbaum company, which sells nothing but flutes and piccolos. carolyn let me play an endless number of different flutes over a period of months - including powell, haynes, altus, miyazawa - and i still found the muratmatsu ex easiest to coax a beautiful sound from. in fact, i even played it side-by-side with their gx model, and still preferred the ex - they keywork was lighter and more nimble. i honestly could not tell a difference in the sounds of the ex and gx.
as always, it will boil down to what you, individually, are looking for in a flute. but definitely give the muramatsu ex a try. hope this helps.
and mr. kessler, i'm probably going to be hitting you up soon for a boston legacy piccolo. i think that's another underdog instrument that kills the competition, and frankly your prices are pretty good!