Basestation sector antennas recommendation

Hi,

What is a good manufacturer of sector antennas?

High quality construction, needs to excel in back-to-front and port-to-port isolation and other antenna design characteristics.

Need to take a modular approach on a crowded spot in order maximize throughput and looking for the highest quality sectors to pair with netmetal5.

Could say carrier-grade but it’s an abused term by now.

http://en.jirous.com

Or what is wrong with mikrotik antennas?
https://mikrotik.com/products/group/antennas