"Homage" has been part of the English language since before 1300, and it's correctly pronounced (in English) as HOM-idj or OM-idj. Whether or not the "h" is pronounced, the accent is on the first syllable. The French pronunciation "oh-MAHZH" is unnecessary. There are no occasions for which the French pronunciation is preferred unless one is speaking French. It sounds affected, and there are no grounds for claiming it has precedence over the English pronunciation.