There are some great resorts in Turkey but it depends what you want. I've been going regularly to various parts of Turkey for 35 years and although I have travelled all over the world, I constantly get drawn back to Turkey at some point every year.
Kusadasi is a very big resort - rather commercialised. Bodrum are is popular. Kas is lovely & Kalkan, if you like smaller resorts. My favourite is the Antalya area. Apart from Antalya there are a number of resorts nearby - Side & Alanya for example. Have a look at the websites for Anatolian Sky or Metak - both specialise in Turkey & are old established companies. They would give you advice if you call them & tell them what you like.
Once you have decided on a resort, go on Tripadvisor for reviews of the hotels by people who have stayed there.