I'm a huge radiohead fan so I'm willing to help, but please remember this is only my opinion. I rarely ever listen to them through IEMs because so much of the spacial layering is lost. I absolutely love listening to them through my Audio Technica AD900s.
With IEMs I'm generally looking for a different vibe than the light, airy, spacious sound of an AD900. I find that when I'm listening to IEMs I'm generally in the mood for a more intimate sound stage and something that focuses more on the vocal range. The SE315 might be the answer, but I think that the UM3X would be spot on if you're looking for that same feeling with an IEM. You can really never recreate the sound stage and spaciousness of a full size headphone with an IEM, so going to the opposite end of the spectrum (collapses, focused, intimate, warm) with an IEM is just as fun when desired.
To answer your question directly - If you're only looking at the ones mentioned above I would recommend the FXT90. The SE315 does not have enough drivers to handle the layering requirements. The TF10 will be a bit fatiguing over longer listening lessons due to their exagerted highs. Not sure about the GR07s (never listened to them).