the Zelda XL would make a big difference on the screen size.
but if you are not interested on that then the Regular one would be enough.
plus you can buy games with what you can save from the price difference.
In the next year, improved models, the New 3DS and New 3DS XL, will most likely be released so you may want to wait and get one of them. I say most likely only because they've only been announced for Japan at this time.