I think Parnel and YYZPRINCESS have conviced me to go for SE and PPS.
I have a few sectors on my next trip on SQ in J; BKK-SIN-MNL; ICN-SIN.
There really is a lot of great information on the SQ forum, like YYZPRINCESS mentioned, that I have been looking through previously and it seems to make the most sense. I did also sign up for the Elite package that gives me 50% bonus miles this year on all AC flights which has been great so far.

Reading through this thread brought back fond memories of being SE, arriving at LHR, my name being called out as soon as the door opened, receiving a personal welcome, handshake , by the friendly AC concierge to London and being taken personally all the way to the next flight including terminal change.
In LAX arriving late night from YVR to connect to SQ for the onward flight to SIN, concierge again there personally welcoming me and taking me all the way to the next gate at the intl. terminal. It was great. I do miss it.

I am sure a lot things have been cut back but I also do see even as E right now that AC is trying hard.
I'll give it a try and let you all know how it's going.