Sprintex does have the new 210+ kit coming shortly and of course the 335 which is a huge blower for this car. I think the 210+ kit will put it in the same ballpark as the centrifugal kit while keeping the flat torque curve, and of course the whine.
The 335 will eclipse any other superchargers out now but it's going to require good gas and for longevity a built engine.