Should I get Umbrella Policy with 1 rental that already has 1mil liability?

I'm looking at purchasing my first rental, and I've gotten an insurance quote that includes 1mil in liability for the property.  Should I also get an Umbrella Policy, or do you think I can hold off until I have at least 2 properties?

I know there are a lot of ins and outs to it, just looking to get a general idea from more experienced investors.