You're welcome. If you have zero patience, but prefer a Gateway over Sky3ds, the best option would indeed be to buy a 3DS XL (or an original 3DS or 2DS). I cannot tell you what formware will be on it, because it differs. Since 9.4 is quite recent (as is 9.5), and most 3DS XLs tend to be in the store for a while, there is a big chance your 3DS XL will be 9.2 or below (you need 9.2 or below for Gateway to work). For example, I bought one in November, and my firmware was 8.1. To be 100% sure you could buy a second hand one and ask the owner, or take a (little) risk and buy a one in a store. The chance that is comes woth 9.3 or higher is very small, but as I said, I cannot 100% guarantee it.
If you really can't wait, you could also buy a Sky3ds. The card has limited options compared to Gateway, but does work on N3DS, and even on firmwares 9.3, 9.4 and 9.5. If you do that, it doesn't really matter what kind of 3DS you buy, or what kind of firmware you have - it would work anyway. But that choice is up to you, of course.