In reply to phja:
One thing you will not get is 5* luxury!
There is little consistency in lodge standards. A great stay one year can be a poor one next year. Cooks and ownership change. So no reliable recommendations are possible.
What I do is have a look around several places before settling on one. Ask to see the vacant rooms and the toilet. Ask what food they have available for that night. The lodges with the best facilities are sometimes booked by large groups, the leaders of which have personal contacts with the owners.
Washing facilities are sometimes limited to a wash basin higher up. Otherwise a shower is a small room with a pebble floor and a solar heating system. The water is frequently "cool". Toilets are mainly squat over a hole. Lodges in Namche are the most "luxurious" and may well have Western style toilets and showers.