Def scratch the Ally & Lo-Fi off your list as they're too soft for an "advanced rider," plus boards like the Ally/B-Nice are full rocker and would be too squirelly. The Eminence, B-Pro, and TRS Narrow are all great options for what you're looking for. I'd also recommend checking out the Roxy Banana Smoothie if you want EC2 instead of C2.
14 NeverSummer Prospector Splitboard . 14 NeverSummer Proto HD . 13 NeverSummer Cobra . 13 Gnu Space Case EC2PTX. 11 Nitro Team Gullwing
14 Now Drive . 13 Now IPO . 13 Salomon Hologram
14 Flow Hylite . 13 32 Binary