I really wanted the 32 gallon tank...and I had read about the problem. I take (2) 4500 mile round trips per year and wanted the extra 6 gallons as a buffer for when I'm out west and time between stations is less than being in more populated areas.
Most I've ever gotten into the 32 gallon tank was something like 29 gallons..and she was laying on E at the time (and had been for almost an hour)
Its worth it if you travel long distances alot...but otherwise the 26 should be fine.
When I'm not traveling I only fill up every 3-4 weeks...so thats nice too.