Take the advice from us 50S owners, go for a 50/50S! If you drive one you will not want to go back to a 35 (or 37)!I have had 2X G35, 1X FX35, 1X EX35, and now the 50S. I have seen posted 0-60 times as low a 5.1 seconds, not bad for a heavy vehicle. Also, the 50's are always AWD, advantage if you live in the snow contry.
Good luck.