For me it's usually P&C or 5th-night free on 30k/night or lower properties... and usually 20k/night properties. Regardless of the point/$ value, dropping 70k/night just isn't something I'm going to do (just as I wouldn't drop $300+ cash on a room either). The exception would be doing an AXON redemption where I might go Cat 7 or 8 if it were for something really special and seasonal points rates were high.