Ham Sandwich: If you like the Thunderpants then imo you and I have similar tastes as far as PRaT is concerned. I've never heard a markl modded D2k, so I can't comment, but I can hear serious potential in the T50RP drivers. Idk about the Thunderpants, though, as it's pretty much a closed design (no sound stage), yet I'm sure the added vibrational damping does some justice. I'd like to hear one some day, but I installed a pair of HP-1 drivers in an HD600 frame and a few people at a Canadian mini-meet said it sounded more open/speaker like with better bass extension. Most at the meet said they preferred it overall to the TP. I thought well of the YH-1/HD600 franken-phone, but I've heard much better. I think if PRaT is of any concern to you a pair of properly damped/housed ortho drivers will deliver in spades. A pair of SFI tweeters I once installed in a Sony MDR-CD380 housing murdered most everything I've heard to date and cost me like $60 to put together.
PRaT is a pretty vague descriptor, but so is "warm," "cold," "detailed," or any other audiophile term, imo. You really have to trust the user of such terms, or have some level of awareness as to what they like/assess in comparison to your own personal tastes and experience. Reading a review by some noob with 100 posts is most probably dribble at best, as is everything I've said in this post pretty much. :p
To each their own, but PRaT and SS is all I ask for in a headphone.
