I’m not familiar with the UM2. The FXT90 is a little more v-shaped than the GR07BE, with more mid-bass emphasis and a bit more treble sparkle overall. No idea if they are an upgrade to the UM2 or not.
Thanks, glad the thread has been useful
The GR07BE, especially if you care about vocals. The MG7 has good mids, considering the bass quantity, but it's not as balanced and refined as the GR07 in that respect.
Unfortunately I'm not aware of one. I would say the Westone ES5 is a direct upgrade but that's quite pricy.