I got used to the rocker/camber after one run and liked it a lot.
I have the Infinity and a Roxy Envi. They stopped making the envi this year but the eminence looks very similar. C2BTX is the same rocker camber as the never summer. I think the magna traction on the Roxy is better on ice than the vario sidecut on the NS. The Roxy is a little stiffer than the Infinity, but they both have good flex between the bindings and are easy to ride. The Roxy is a smoother ride, especially at speed. It feels very light.
I'd say go with the Eminence, especially for ice. We had some icy conditions this year and my board really held an edge when some of the people I was riding with were skidding out.