Personally, I prefer the MIDI version, mostly because I got into Dragon Quest 8 due to the 3DS version, which uses the MIDI version. It also seems a bit more "there", if you know what I mean. Either way, the soundtrack has some of my highest ratings for an RPG, with the battle theme being the best one I've ever heard, and the boss battle theme being the 2nd best, only bested by Megalovania.