Using 75watts ballast with 9005 and osram xenarc d2s from 5 months. Never gave me any issues.
My advice: Use local ones with morimoto's bulbs.
Also, h11 can bear 55w as well according to them.
Local ballasts aren't complete 55ish, that's why I connected 75w. It is more like 60ish, and provide me with an optimum output