Mimou I suggest when they finally release the 1.00 firmware (probably in 5 years) you try out 1.21 on your SE5s. I won't be surprised if you like that pairing. Since you mention the SE5 are too warm on 1.00. I found the 8A to pair very well on this combo. Still a bit too much bass for my liking but much better than on 1.00.
After trying again today...does not sound so warm. I am not sure if it is ear burn in, cable burn in or whatever, but today it sounds lovely, on par with the Tera - SE5 pairing but with a different flavor.