Quintessa from 1999 shouldn't be anywhere near past time - that wine can go for a while. So you must have had a bad bottle.
The diamond bins are efficient for space. My uncle had them under his house in Napa and I built one side of my cellar with bins. That's why I wouldn't do it again. Taking out a bottle from the second row from the bottom is a pain! You have to hold all the other bottles so they don't fall, and if you have Burgundy or Rhone shaped bottles, they don't stack well at all - it's very precarious to take out a bottom bottle!
They're great when you get a case and can just fill up the bin though.
Colorado has flood plains? Who knew?