Chris,

I did realize the issue with Lounge access, in general the main benefit of *S seems to be just bonus miles. (the only reasonable benefit lounge-wise for me would be on LH, but then it seems that with the same miles Aeroplan gives me *G when LH only gives *S)

In my situation it pretty much seems to come down to whether I want status benefits (with the low bar for *G, Aeroplan seems to be the best) or redemption, which seems to be better with bmi DC.