I don't know a lot about turbo's but I don't want to loose the responsiveness of the current. A single would be a whole lot easier to work on though.
With the right modern turbo you can get really great response from a single, the main reason I stayed twin is that despite the responsiveness you can get from a single they till come on power much harder compared to twins, which in a RWD like ours means its much more likely to break traction compared to the smooth progressiveness of twins.I don't know a lot about turbo's but I don't want to loose the responsiveness of the current. A single would be a whole lot easier to work on though.