Very interested in this......i blew a rear shock at 60,000 miles in my 2009 mazda 5, replaced them with KYB's and am not satisfied. The stock shocks did a better job, but are not durable. I had Koni FSD's and yellows in mind.
I have boiled it down to buying the stock shocks again or Koni yellows. Yellows would be a great choice if the ride is good and i can go to the fronts next and eventually lower the thing if i want.....anxious to see a detailed report on the yellows!!!
Also, time again for tires....continental dsw's, 225-45-17's are worn uneven to the point of no return. I have 32,000 on them. I know the rear geometry of the five is the culprit, but i am willing to buy new tires every couple of years to keep the spirited handling of the five!!!!!