I went with the Pace Edwards KMT5379 Ultra Groove Tonneau Cover Kit (07-16 Toyota Tundra CrewMax 5ft 5in Bed Metal) for my 2020 1794. Amazon says it doesn't fit but its the model Leer recommends for my vehicle. It set me back about $1800. Check on the Leer site, they were running rebates a while back.
I picked this tonneau for a few reasons. I plan on getting a rack system later and I wanted the metal cover as a theft deterrent. The plastic version is a bit cheaper and lighter. Overall the cover is well made with minimal leaking; I had a few minor issues with some of the plastic parts breaking. Best part is is fits with the Decked system I had installed in my bed.