As of my last update in September 2022, Emaar is a renowned real estate developer with several projects in Gurgaon. However, the "best" 3 & 4 BHK apartments in their projects may vary depending on individual preferences, budget, and specific project offerings. It is essential to conduct thorough research and visit the projects personally to make an informed decision. Here are a few Emaar projects in Gurgaon that have received positive reviews:

1. Emaar Palm Gardens: Located in Sector 83, Gurgaon, this project offers 3 & 4 BHK apartments with modern amenities like a clubhouse, swimming pool, landscaped gardens, and sports facilities.
2. Emaar Palm Premier: Situated in Sector 77, Gurgaon, this project features spacious 3 & 4 BHK apartments with contemporary designs and lifestyle amenities.
3. Emaar Gurgaon Greens: Located in Sector 102, Gurgaon, this project offers 3 & 4 BHK apartments with lush green surroundings and various recreational facilities.
4. Emaar Imperial Gardens: Situated in Sector 102, Gurgaon, this project boasts of elegant 3 & 4 BHK apartments and well-designed landscapes.

Please note that the popularity and availability of units in these projects may have changed since my last update. For the latest information, I recommend visiting Emaar's official website or reaching out to their sales representatives to inquire about the current status of their projects in Gurgaon and to explore the best 3 & 4 BHK apartment options available.