Right, now that I've burnt them in for almost 24 hours and have listened extensively in both modes, I have some more things to report back.
Firstly, they sound much better in the default mode rather than the deep bass mode, which recesses the treble way too much for my liking. After some burning in, the treble in clear bass mode has definitely improved, but still feels like its hiding a bit.
Secondly, they're very comfortable to wear for long periods, even more so than my SF5pros. I tried out all the various tips, but in the end went with the default one as it was the best fit for me. As a side note, the bi-flanges seemed to remove even more treble from the sound.
Thirdly, their isolation isn't that great. Listening to them on the bus and at the gym ,they still leaked a lot of noise in.
Changing my source to the Cowon D2, they sounded better, even with slow jazz music like Norah Jones.
My overall verdict, however, is still the same. Great bang for buck, but don't expect $200+ IEM levels of sound.