ZigBee Sticks - external Antenna

I’m planing to build a parallel world next to zwave infrastructure based on zigbee.

I’ve seen these as supported " ZIGBEE TRANSCEIVER MODULE, 2.4GHZ, USB ETRX357USB+8M By TELEGESIS"…

…but its quite expensive @90+€.
Does anyone have recommendation for future proof dongle (v3?) that is supported and used a lot + maybe little less expensive for experimental purpose.
IS there any that has external antenna support, or allows to solder something on the pcb board?

Thanks a lot Norbert