I'd recommend getting a physical copy instead of downloading the digital version. You'll probably be able to find it cheaper online, and the digital version is prone to file corruption more than the physical, so if that's a risk you'd rather do without, then the physical copy will give you peace of mind. Then again lots of people use the digital version and haven't had any problems, so it's up to you, but you'll definitely get a physical copy cheaper than buying the digital straight from the eShop.