Hi there! I've tried out the Iskur in-store at a Staples and loved the lumbar support, but it was a bit firm for my tastes. From what I've heard, the lumbar arch on the Enki is quite similar to the standard Iskur's - is the Enki more cushiony? Any firsthand experiences with the Enki? (I haven't found a place with the Enki available to test out)