If you can manage the tapes, the Abena Premium M3 diapers (with cloth-like backing) are very soft and comfortable (you hardly know you're wearing them). If I was incontinent, they'd probably be my top choice for daytime wear.
The plastic-backed Abena Abri-Form M4s are more absorbent and fit more snugly for better containment.
BetterDry diapers are probably going to be too bulky, and if you're changing regularly you'll probably be wasting the extra absorbency.
You can get rolls of cheap flushable nappy liners (made from non-woven bamboo fibres) that keep moisture away from the skin, and make flushing the diaper contents easier. They're intended for cloth diapers, but they'd work just as well in disposables.