I'm not saying it was intended to be played with an analog stick, but I am saying that the D-Pad is no closer to an arcade stick as the analog stick imo. The analog stick doesn't bother me all that much. It takes some getting use to, but I played through the wii version np with the analog stick.
My biggest point though would be if you wanna play MS the way it's supposed to be played get a Neo-Geo, cause none of the ports have been perfect on any system. If you just wanna play the games and can deal with them not being arcade perfect, I think wii version is just fine, and I would bet that the PS2 version will also be just fine. The Xbox version of 3, 4, and 5 were ok, the Playstation versions of 1 and X were fine. The fact that you can get the entire series on one disc for $40 is awsome despite the imperfections.