I've got an older wells 7100 series that came out of a mortal kombat cab, and it works/looks great. Only problem i have is with pacman and just a couple of other games, can't find a res where i can see the score and how many men you have(cuts both the score and men in half), but i just adjust the vert horiz and its an easy fix, then adjust back when i'm done playing that game, only have to do it for 10 or so games, every other game the res is fine. I don't like using hwstrech on pacman either because then it doesn't look like an aracde monitor anymore. I don't like pacman at 640 by 480, i think i use something like 356x288 or something close to that, but for games like merc i actually use 640 by 420 i think it is, doesn't have screen jump like 640 by 480. Also when u say you hook your mame box to another montior....is that a pc monitor by chance or another arcade monitor? You MUST make sure you have direct draw setup for an arcade monitor, and i use d3d for vert games at 640 by 420.