I am thinking that I might be wanting more bass than these can provide. My test track is the Ultimate Woofer Test by Techmaster PEB. Not audiophile listening for sure, but I like to test bass extension and articulation with it. My HD650's have a lovely rumble on that song and can hit all the frequencies, but I find the T50rp's to not have enough oomph, especially in the deepest bass regions. For 95% of music, not noticeable and these are fantastic sounding. But it would be awesome if they could hit just a little harder.
My current setup is with Jmoney Beyerpad, plasticine on baffles, stiff felt with holes punched into it on the back of the driver, acoustic foam and felt in cup, unrolled cotton balls in cup. Visible baffle port is taped over, nothing done to the cup bass vent. Moving towards the DBV 3 from BMF, although I don't think I will be doing anything more to enhance the treble as it is already a tiny bit much for my preferences. I am going to keep experimenting to get more bass. Never thought I was a basshead, but I guess I am. I will be getting some LCD-2's in a week so will finally be able to really A/B the T50rp's against them.