PCI i would avoid. For no other reason than if PSU of PC hacks up, the first think it does is burn all inside PC, hence your expensive PCI motion controller. I was repairing PCs at a certain point of time, so take my word on that. When it burns, it burns all. Nothing is spared.
Boyan I have to say you are talking blx. I also have been in PC's when you were in nappy's and I have never seen a pc PS "burn all inside" as you say.

And as you know the stand alone controllers are not yet mature enough to be singing the praises yet. This has been debated in another thread.