Stick with the 240sx. MR driving dynamics take a lot of getting used to. Also, I haven't heard anything particularly outstanding about the N/A MR-2. What about rigidity? I know that on the turbo MR-2, the weak point is chassis flex. Perhaps with the comparitively low power on the NA it's not an issue.
Regardless, stick with the 240sx. But I'm biased... and what did you expect? You're posting on a 240sx forum.
