But FWIW, my pref when i hit the 500k point bank ... we immediately book a hotel+miles to Maui.
You can get a super nice 8-9 night stay and depending on your miles situation - a good shot at 1st class upgrades on tickets.
There's nothing better than 10 days in Maui on somebody else's dollar.
But the them here ... USE EM! Have a blast. As a fellow road warrior, when i send my wife that email 2x/year that says "honey - i have 500,000 points - book something!" she just blows up.
enjoy it and let marriott take care of you for a week or two for once!