I'll continue looking. I don't really plan to fly Delta anymore, so there would be nothing to upgrade. I only have one 2-hour flight left to complete on Delta.
The hotel deal sounds like it may be an option. I'll look into that. I'm just wondering whether I'll get any more than $150/25K redemption for that.
The car rental I'm looking at right now is 24.5K miles for a 4-day rental which is sold for only $95 incl taxes on Hotwire. So it may seem like a deal if you compare to regular car rental rates, but it's not really compared to Hotwire where rates are about $15/day...
Did I mention how much I hate Delta now? The only reason I have these miles is because they converted me from NWA. Ugh. When I had to fly them before, I earned miles on Continental instead. No wonder Continental ran away from that program.