I dont currently own nor have ever owned any of the 3 titles.
IM never did anything for me
SM is a just an all around great game
TOTAN as every says is a beautiful game but the game play itself is pretty damn boring
With the guy who has been adding/rewriting TOTAN code that very well just might put TOTAN at a serious fun level with depth!
For the cost of TOTAN you could buy 2 pins and if you're on a tight budget like me that pretty much makes the decision every time.