But in many cases, J exits the plane first and therefore gets through immigration first.

Whenever I'm searching for a long-haul award, I look for J first. That's my favorite award. Then F if I can't find J, and finally Y if I'm flying an alliance where I have at least a mid-tier status.

And contrary to most of FT, I like older-style barcalounger J seats better than the little lie-flat coffins.

My disclaimer here is that when I search for awards with my existing *A and OW miles, I tend to see a lot more UA, AA, US, AC, etc. availability than anything else. If I ran a query and saw a lot of CX, SQ, LH, LX, etc. F availability on my exact dates/routes, I have to admit I'd be rethinking my approach.