It mostly depends on which Zigbee gateway application you plan on using, and it should also be noted again that you can also re-purpose Silicon Labs or Texas Instruments based USB adapters to make great stand-alone Zigbee Router devices if reflash them with such firmware and power it with a USB-changer, so even if you do not like it then it will not be wasted money if can reuse them for that as it always recommended to have many Zigbee Router devices in your Zigbee network mesh → Zigbee networks: how to guide for avoiding interference and optimize for getting better range + coverage
Anyway, if you plan on going with Home Assistant’s built-in ZHA integration as your Zigbee gateway then you can today practically use any Zigbee Coordinator with a modern radio SoC from Silicon Labs or Texas Instruments; as the ZHA integration depends on the zigpy library which is hardware-independent and offer full feature-parity between Silicon Labs or Texas Instruments based adapters, and both are stable. See → https://www.home-assistant.io/integrations/zha
However, if you instead plan on going with Zigbee2MQTT (a.k.a. Z2M) as your Zigbee gateway then it is currently recommended to go with a modern radio SoC from Texas Instruments (e.g. a CC2652P based adapter like the Sonoff ZBDongle-P). Silicon Labs based adapters also work good in Zigbee2MQTT but they are missing backup and restore feature before it raches feature-parity there so still listed as not recommended → https://www.zigbee2mqtt.io/guide/adapters/
ConBee adapter from Dresden Elektron will also work great with the ZHA integration and also good in Zigbee2MQTT (though not with full feature-parity in Z2M), but even the currently sold ConBee II and RaspBee II uses an older radio SoC so not recommended for a new purchase today so that is right now really just an option for those who already own one and want to migrate from deCONZ/Phoscon.