I am seriously thinking about upgrading my 3DS XL to a New 3DS. I want to do a trade in at Game (I live in the UK), but I want to know if they will let me do a system transfer in store. I don't want to go through with the payment and they don't let me transfer my data!
Also, will I miss the XL if I just went down to a standard 3DS?
The only way to find out for sure is to ask them, since store policy may vary. I recommend calling them up ahead of time and explaining your situation.
I personally would miss the screen size, though a New 3DS is a bit bigger than the "old" normal 3DS models.
