You're welcome!

Having done the UA F and SQ A380 suites F, I'd go with the latter. The SQ is the best of several international F's I've ever flown, and far superior to UA in both the hard and soft products. Based on what I've flown and read, I'd even rate it the top international F but for the new EY F options on its A380.

UA F is certainly nothing to sneeze at, especially for someone who has never done international F before, but in addition to being generally inferior to SQ F the quality of the FA service varies a lot and can be downright mediocre.

Of course, you'd save more money on your revenue flights for this trip if you cross the Pacific on an award ticket. But from your posts I assume it's not a controlling consideration.

If you do go SQ F, two additional pieces of advice:

1. Try to bag the daytime NRT-SIN A380 flight, as you'll get to enjoy the experience more.
2. If you do end up securing an award ticket that goes on to BKK, I believe that by virtue of arriving on SQ F (even though you'd go on to BKK in J) you can gain access in transit to the SQ Private Room Lounge in SIN, which is wonderful.

Again, hope it all works out.