Yup. Currently listening to the T5p's at work... and to tell you the truth, I don't like them that much... LOL
With this I mean, I WOULD HAVE NEVER EVER paid $1000+ for them.
FULLY prefer the Signature DJs over them, better bass response, impact, presence.
Comparable sound stage but imaging might go a bit in favor of the Beyer but I believe it's probably due to their highs... and speaking of highs, sometimes these Beyers SHINE!!! But most of the times I actually find them a bit strident up top!
Mids are actually quite good and forward which I enjoy. But overall, the Sig DJ I just prefer.
I guess these Beyers has its fans but I'm still on the fence...
SigDJ gets a sure recommendation from me if you enjoy bass, good imaging, detailed non-ear-fatiguing highs with enjoyable but a bit recessed mids with excellent isolation, no leakage and portable to boot.
In short summary, current headphone ranking (only based on sound performance/appreciation of the headphones I have at the moment):
Ultrasone Signature DJ = Denon D5000 with Lawton Mods > MrSpeakers Alpha Dogs > Shure SRH1540 > Perfect Sound D901 Dido > Beyer T5p (with Moon Audio Blue Dragon cable) > Yamaha HPH-MT220 = MrSpeakers Mad Dogs > Sennheiser Momentum (on-ear blue) > AIAIAI TMA-1 Young Guru Edition > Spider Moonlight Studio Headphones > Panasonic RP-HTF600-S > JVC HA-SZ2000