Dave ,
big con on roller is cost and maintenance .
Potential is there for more power .
Will there be issues with city stop/start driving - lifter oiling ?
SFT as long as it runs in ok you should be good to go . No issues with low rpm/idle in city traffic . Easier on valve train components .
I guess each owner will decide .
I have fellow bracket racers who are reluctant to run their solid roller motors on the street in any regular time frame .
for me , like Ron , I will go SFT for my 505 just like my 440 .
good luck

Tex