yeee fellow snowboarder, that rail looks soo nice, i would definitly go for it. make sure you commit to getting on the rail, and i guess do what you can to fall an the grassy side if possible. i know i ate shit a bunch of times on my first urban. i think TerminatorX has a video.
and as for the rail steepness either or would be good, if you plan on doing frontboards and / or lipside stuff i would go with the one that was posted in the pic, so you dont have to worry about vertical balance as much.
good luck man.