i think either one would be fine .the porting I did on your jugs is setup similar to my aggresive trail she that has fmf fattys and it rips hard ,even i n the lowend rpm range ,basiclly the sst series fmf's wil l likely have a tad more topend which is probably what your looking for to compliment the port work and your riding style yo u requested , if i had a choice ...id probably pick the sst ,but realisticly the difference between them would probably be within 1 or 2 horsepower most likely IMO .