I bought a pair of the SRH840s and like them so far. I did note somewhat of a mid-bass hump on classical material. Midrange and treble seems quite good independent of the bass; these are not bright at all but very smooth and well controlled IMO. I have not done anything other than listen to these (i.e., no break-in if you believe in that). I am driving these with a Gilmore Dynamic (w/Gilmore PSU).
If the SRH440s were more neutral, I might be more interested in them, but so far I think I will keep the 840s. I also have a pair of AKG K271s with velour pads that I use at work for comparison.