Try Sammy's Travel. Sammy's is operated by a very enthusiastic, very professional young man named Mehmet. The tour we took last year was amazing - we were totally unaware that the ruins in Ephesus were so extensive and so interesting. Make sure to pay the extra $10 to go to the Terrace Houses. Or you can try Kusadasi Tours. I think the website is www.kusadasi.biz
Where is sammys travel and how does the tour work is it far from port ect?
When you get back from Ephesus,have a look around Kusadasi waterfront,particularly Pigeon Island. The views are fantastic.
ps check out my photo's on this site. Enjoy your trip.