Honestly, if you don't plan on going to the park... might want to look at the Heritage as well. Owning/loving a Never Summer Proto CT has become the latest of many internet trends ("It's what the cool kids ride!"). It's a great board, but it isn't the only good board out there.
I'd vote for the SL as well. Hell the Heritage might be too aggressive for such a newer rider. The SL is easy to manipulate. had one last year and miss it dearly but this year wanted to learn ground tricks so I traded it for an Evo
I would say the SL as well. The SL is a great deck - I learned to ride on one last and loved it. I went with a Heritage this year and love it... however it would have been too much board for me last year. The SL is definitely more forgiving.