Doug, Eric, and the entire Zadart team run a world class operation.
I have had the pleasure of renting a couple times from Zadart when I am in town, most recently their brand new Lamborghini Huracan, and I can tell you there are few better ways to enjoy a beautiful Seattle day than behind the wheel of your dream car. Their prices are significantly less than rental agency's elsewhere (LA/Vegas) but their cars are in just as good of condition.
To make a good thing better, it seems they're always adding new cars to the fleet, so I'll never run out of new options.
Whether it's a special occasion or just a spoiling of yourself, Zadart is truly the way to go.
Ps: I must warn you, if you rent once, you WILL be back!