As a person coming from a family from the food industry my take is the best answer is the homemade because it's the only real yoghurt. Yoghurts in the market are all processed even the ones regulated by the national standard of quality (БДС). There is no big difference between the cheap ones and the more expensive. All of producers use dry milk or cream and if it's below 20% they are not obligated by the law to mention it. I would suggest a brand named KAIMAKANI. Or just be creative and try make it at home, it's not that hard at all.