If you don't spend time in the park and you're more into freeride I'd look at the TRS series maybe in a 157. It's maybe a little aggressive for a beginner compared to the Skate Banana but the C2 is very forgiving and those boards are more of a mid flex, so not too stiff. I wouldn't want a full banana rocker board if you ride a lot of hardpack/ice. If you ride on hardpack and ice you'll love the Magnatraction on the Lib boards.
I second Torpedo's opinion. It's hard to go wrong with a TRS for what you plan on using it for. I think you will very happy as a board you go grow with. It might be more a question of your current skill level and how quickly you want to progress. If you get the Skate Banana now, you might feel like you want a different board next season for more 'all mountain' riding, but it's personal preference.
My son has the Skate Banana and he uses it as a freeride all mountain board. We do a fair amount of side country riding going into and out of lift and shuttle served back country areas in all conditions and I am very impressed with the Skate Banana. He is easily the fastest and most aggressive rider in his group and the board does very well on ice and hard pack - especially considering it's negative camber profile.
If you are more on the beginner side of the spectrum I think the Skate Banana will help you progress more quickly than going with the TRS will. the 'pure banana' rocker profile helps people progress very quickly.
However, if you are more in the intermediate skill range, I think you will be happier with a TRS (or perhaps an Attack Banana) long term. The TRS's flex and camber profile might be just a little less playful and beginner friendly than the Skate is which depending on your skill level and progression could be an positive or negative trait.
You may not know which you prefer until you get some more days behind you on the hill - but I think you will happy with either a TRS or a Skate Banana. It just depends on what you want to use it for and your preferences, skill level and how fast you want to progress vs. how soon you (might) feel like you want to replace the board.