I only want to play games...
WITH CHEATS.
Gateway 3DS and Cubic Ninja.
You don't NEED sysNAND backup or ROM dumping. But they come really handy.
Cheats? Sky3DS ONLY plays ROMs. It does not cheat.
If you want a robust cheat system, Gateway + CN.
If you JUST want to play 3DS games, Sky3DS.
Again, depends on your firmware if you can even use Gateway. Sky3DS does not matter.
So you can buy the Hummer (Gateway), or a Porsche (Sky3DS). Hummer does everything and more but is big and hard to get working. Porsche just goes fast and gets you there and doesn't require much maintenance.
Price doesn't matter. To run Gateway you'll need Cubic Ninja which equals about the same price for a Sky3DS.
Problem is, Sky3DS can't play online unless you own a Powersaves Pro Dongle to get private headers. Or else Nintendo will Ban Hammer you.