Unfortunately not. I have been trying to scrounge up funds to get an SRH750 but haven't done so yet. I spent my war chest this month on a bunch of stuff - Little Dot Q, NF uDAC and Turbine Golds. So have to wait a bit to replenish my funds to get the SRH750.
I also don't have my M50s any more. Sold them because I moved on to something else, but I had them for a long time (more than a year) so I am quite familiar with their sound... and my friends still have m50s so I still listen to them every time we have a meet and compare them to other cans.
Don't do anything right now like buying the SRH750s just off my word. I mean I *really* loved them but since I don't own them yet I haven't had time to really study their sound yet. What I suggest is try to find somewhere (or someone) to audition the SRH750s and go from there. But if you're like me I think you'll have quite a pleasant experience with them.