Name: Marilyn, aka "Poly" South San Francisco Bay Area (Zone 9b) "The mountains are calling..."
Are you kidding me? ONE?!! ONLY ONE?!!
If I really really really absolutely positively could only have ONE (?!!) daylily, and (you didn't explicitly say, but presumably) it has to be a currently registered daylily (not a seedling), I'd be hard put to it to choose between 'Osterized' and 'December Wedding'. (If you asked this question a month or so ago, it would have been a three-way tie. Ask us again next year, and my answer may also vary... or it may not.)