Okay, the title kind of says it all, but here are the particulars...

I will very likely have to go to SIN in early Oct (probably in business class rather than coach).

I'm PM with DL. I figure I should probably go on ST rather than try another alliance as that will pretty much lock PM again for next year. Being based out of SDF doesn't help me many options as far as alliances for where I usually travel (MKE, BWI, LAX). But I'm open to honest suggestions.

Recommendations? Warnings?
What can I look for and look out for?

As always, TIA!