

Retro Game Corps on YouTube has been on a trend of reviewing all the very recent DS emulation handhelds that are and will be soon hitting the market. It’s a pretty new thing you’re wanting to do, otherwise use an Android phone/tablet.
You can also install homebrew on your 3DS to unlock more potential.
How about using an open source and audited one with a good track record? That would most certainly be better that letting your ISP see all your traffic