I would suggest going with 175153-1 and 175155-1 as it is for 22-26AWG which is more typically sized for cabs. The 16-20s are pretty large in comparison
Unless of course you plan on using larger wires. There's some really bad advice on the AO wiki about these contacts to get them oversized so you can just squash or trim them down for smaller gauge wires, but crimping doesn't work like that. Best thing to do is check the AWG you're using and buy accordingly.