I cant speak to the T9's but have read many comments about the bass being "bloated" etc...some people seem to eq them, but I wouldnt spend $900 to have to eq cans to make them sound "better"...thats just me.
I do have Beyers and Senns and others and I do have the T1's....they are not perfect but they really do a great job considering the price they can be found at. I had Audeze LCD2's and sold them after I got the T1's, just more my liking with a sound signature to me that sounds very nice and not dark at all.
Had mine for about a year now T1 2nd gen. They are very well rounded and musical IMO..I would by these again....
Good luck with your search....
Alex