I feel in such a professional biz, the name needs to sound real professional. I don't feel it can be a catchy thing because it will determine the imagine people have of you and your biz. How about something like: Real Estate Valuations or Optimum Property Valuations or Residential Property Valuations (if they will deal solely in residential appraisals). Or Optimum Property Valuations. You might consider using a derivative of any of those words.

Best wishes! Alena.