Have either of you guys considered Bambino diapers?
http://www.bambinodiapers.com
You can ignore the cutesy baby prints... they make a line (Bianco) that is solid white.
I've been wearing them consistantly for several months now, they are really great... last for 8-10 hours... and the price is comparable with Abri-form X-plus or Molicare Super Plus.
I know a lot of incontinent people may dismiss these diapers as just playthings for AB/DLs or "perverts"... but the company that is making these certainly knows what they are doing. Order a sample pack... you won't be dissapointed.