This is completely subjective and depends on your requirements but we can give you a few pointers. At PMC we stock the leading brands from Jabra, Poly, Epos Yealink and Project Telecom, so you’re sure to find something that suits you on our website!
If you are planning on using your Bluetooth for calls and meetings throughout the day, you should make sure you buy an office Bluetooth headset that has good noise reduction (look for ANC in the specs) and uses the latest version of Bluetooth for ultimate compatibility and connection quality.
If you’re using your headset more for listening to audio to help you focus between calls and get in the zone perhaps for programming, or writing, then perhaps look at models that are lightweight and comfortable yet feature larger earcups to help isolate you and allow you to focus on the audio.
In short, find the style that fits your requirements.