In my view, the Lelit E is well designed, decent quality and the best value for money. Hindsight being 20/20, I would have bought the Lelit Bianca. And with even more foresight, I should have bought a lever machine. But I really didn’t understand the benefits of lever machines back then.
The main benefit of the Lelit over the Breville Dual Boiler is a somewhat better quality build and its infinite adjustability (through its programs). It can run fully automatic or manually, both with full control over every parameter. The only very very important thing that is missing is flow control, as has the Bianca.
Take a deep breath and spend the money. Stretch as much as you can. Once you’ve bought it, it’s very costly to further upgrade.