For people who want to use their N3DS with roms pretty quickly, and have some extra money, best would be to just get a Sky3DS because I really doubt the N3DS exploit will be released today or even during this month (though I would be happy to be wrong). Well, wait until tomorrow before buying one at least, but I don't think it'll change anything.
As long as you don't update your N3DS and keep it in the 9.0~9.2 range, you can always get a gateway later (or use it, if you already have one, like me) once the exploit will be available, and then, sell your Sky3DS. There will always be some peoples stuck with 9.3+ or who want a up-to-date N3DS (as it seems gateway won't support 9.5 emunand at launch) so you shouldn't have any problem to sell it and also shouldn't lose a lot of money in the process.