Out of the 3 different magic systems, which one would you choose?

[Aaron L]

XPH, easy.

 

[Pants]

To tack onto a game using the Vancian System?
XPH, easily.
It fits in with the existing system of magic alot better than ToM does. Haven't read MoI yet.

To replace the Vancian system/create a new magic-y flavor for a campaign world?
Tome of Magic
I could see running a game where the ONLY casters are shadowcasters or where there is no magic, but Binders are running around everywhere.

I see XPH as more of a 'plug in' system and ToM as more of a 'build around' system(s).