The EVO has a teflon coated aluminium boiler. This should prevent pitting and corrosion in theory, and with no abrasive action on the teflon should theoretically last a long time. The use of descalers should be checked for the effect on the teflon coating of the boiler. The non-chromed group seems like a minor improvement. I think this is a good choice for a keen espresso starter, but I would look for a decent grinder too.