New Pandora Box 5 is really good; it's still emulation though...Really, for the money; I would recommend just getting an Xbox ONE X, or a PS4Pro.
Both have a ton of arcade perfect conversions of all the classic games, from PacMan to all the NeoGeo games, and then you can get an arcade stick and play all the modern fighters, like DragonBallZ, new MK, SF, etc...Plus you can play the latest releases, and with HDR on 4K, they look incredible! Like jaw dropping.
You really can't beat the value of the consoles. The Pandora boxes are alright, but for me, unless you have space for 10+ dedicated Arcade Cabinets, it's just not the same; better off just downloading MAME for free on your PC and plugging that PS4 or XboxOne Arcade stick in to play the MAME games.