Recommended Verizon LTE USB modems for balance series?

I am putting in a lot of max-br1 routers with integrated cellular modems, and they are working great. Now I need to install several balance 20 routers for customers who have to load balance across two crap DSL lines.

In the past (on other routers), I have had terrible luck with most USB connected modems. Can anyone recommend a solid 4G/LTE (Verizon, static IP APN) modem with real antennas? I see that peplink supports several hundred. I am looking to benefit from peoples real world experience.

Thanks

Never mind - I had missed the fact that the balance 30 has an integrated modem. I will use that