Totan is a gorgeous game. Gameplay is not that great esp. Compared to some of the b/w games of the same vintage. S/w bugs and exploits mean that this game as it stands will never be a true player.
IM while not that deep is matched well with the difficulty of gameplay. Between the two, I prefer this game. But I had one and traded it out for a TAF and was much happier with that game.
It sounds like you are not that charmed with either Totan or IM. Do you have other pinball options to consider?