Cant help
but I have an ME Xero 550 down bag and a Rab accent 700, the Rab 700 is crap and has been since day 1, the ME one isnt.
But for the last year I've been using a custom made Cumulus 450 Quilt, it beats them both hands down, Cumulus were really helpful and speak better English than me.
So although I rate ME highly, I cant speak highly enough about Cumulus kit, over winter I'm hoping to get a custom 350 made as well.
I also dont subscribe to the down is sh!te when wet thing either, dont get it wet