Thread: VCO>VCF>VCA or VCO>VCA>VCF?
A VCA at the end offers the most flexibility; especially if you are driving your filter into self-oscillation range. The sound will be tighter. But maybe you WANT the filter to ring out if you're under those conditions.
My opinion is to do a little homework with your rig. Try and overdrive the filter if you can and see how that affects things in your rig. The type of filter and how it's implemented is going to have the most influence... my Roland style filter won't self-oscillate while my MS20-style with do that all day.