If you have a FMIC and a big enough turbo to make the standard airbox a restriction (say over 330bhp or so) then it makes sense to use a SIP and drop the cone filter down to the old SMIC position for the cold air feed and shorter intake piping. (But beware of deep puddles).
If you just have the standard turbo or hybrid with a FMIC then the standard airbox is fine and personally I wouldn't even use a cone filter with that setup.
would prefer not to use one tbh i'm hoping for the 340bhp mark, once i fit a paddle clutch i will be taking it to flea for a map. i just want every thing that's needed in place so i only have to go once!