We stayed at the George V about 6 years ago. It's probably been refurbished since then, but we enjoyed it greatly. The location can't be beat as it's just a little over a block to the Metro station.
To be honest, you could probably find the same quality or better hotel for less money elsewhere in Paris. I enjoyed staying there, but the cost was exorbitant for what we got.
Travel & Leisure magazine usually does a listing of great hotel finds in Paris and other world capitals every year. You could check it out online. Or try Conde Nast Traveler for suggestions.