Cool. I didn't know Acid Pro 3 could do this.
>>"[it is just like as if you played it, but done thru the software], and much quicker. The quality of your sound source is important"
Indeed it is.
But what you are saying is that you are no longer really using your JV/XP as your sound source anyway.
If you take a sequence and switch sound sources, you can bet it won't sound the same; quite apart from the sounds themselves being different (as you say your rhythm kits are), you would have played (created) the sequence differently through a different sound source to begin with.
So this is not quite as simple as just having ACID convert it. *If* you are genuinely starting from the JV/XP.
And this doesn't address the issue of the .svq sequence parameters not included in the SMF protocol (though you guys may be starting with SMFs anyway).