i would check out mokafix pedal emulations if i was you. the modelling this guy does is unreal (i have a few of the hardware versions and he gets very very close). if you want that screaming routemaster 303 sound or that warm bubbly SUF sound then these are your guys. plus the price is amazing!
my faves are cream tube, the bat and muffin rider. Effects
that was the sort of thing i was looking 4 , shame they dont do 4 macs os