Be very careful. I sold my old plus 8 to buy a new 4/4. After a couple of weeks I really missed the power. A year or so later I sold the 4/4 and bought a new roadster ( they'd just started making them).
Seven years later I went for another 4/4 because of ground clearance issues with the roadster. I ended up buying an older plus 4 a couple of years ago.
The 4/4 has to be revved alot, which is fun but tiring if you are used to the rffortless power of the plus 8.
Think carefully.......
Nick