I also thought about gettuing one.
Advantages? Available now, finally.
Disadvantages? The Niche is on order, due fairly soon.
Do I want/need both? Not really.
Which one suits me best? If I knew that, I’d get that one and that one only.
Why order the Niche then? because that is a firm order and until a few days ago, the Eureka was merely on a ‘probably December’. I’ve seen things like that turn up months overdue before (like the laptop I’ve been waiting several months for), and I’ve even some some companies (not suggesting Eureka would do this) use such advance dates as a spoiler to try to stop people ordering competitors products until they can ship.