but i reckon if you're just going to run stuff thru fx, then you might be better off with plogue bidule.
plogue bidule isn't free..and if you want to build your own fx, you are much more limited. if you want to use someone else's fx, its a great choice..
pd on osx doesn't even support vst
are you sure about that? have you tried compiling vst~? i don't see any reason pd wouldn't support VST other than nobody bothered to compile vst~.pd_darwin yet..