$200 for a lux ... guess that they have fallen in price since the sunbeams came out ...
In terms of durability, I have heard reports of six year-old luxes being fine. Consistency and grind quality should be more or less identical; they have the same burr sets.
Personally, for espresso, I would avoid both of these grinders like the plague and would extend the budget to the iberital challenge. The same burr set is in all of these grinders, but the iberital has a stepless worm drive adjustment. I have borrowed a friends lux for french press on trips and it was sensational for that purpose. The lux is a bit smaller, so probably more convenient if you want to travel with it, but Id probably go for the sunbeam for the $$$.