Just buy the Michelin PS2's. Great dry performance (better than the MPSS) and very good wet traction (almost as good as the MPSS). The sizes you want are N3 rated (you don't really need N rated tires). If you upsize the rear to 295/30/18 you can also get N3 and N4. This is a common upsize on the Turbo rear tire.
The new PS4S tire will be a great all round (wet & dry and better wear rating) tire. And probably less $$ than the PS2 and MPSS.......but I would not wait for them if you need tires.