I like my Panorama 5 in 1 for my RV, it has a built in ground plane so it works well with fiberglass/rubber roofs like most RV’s without having to fabricate your own ground plane.
I currently have a hotspot and use TS9 to SMA adapters for the antenna and it consistently increases reported signal by 10dbm over just the hotspot inside. I do want to get a real LTE router and like you am waiting to see more info on the BR1 Mk2, can’t wait to have real SMA connectors on the modem.
I agree on the boosters, but mldowling may be thinking of wireless boosters when it comes to modem damage. Wireless boosters do 50db+ amplification and some people try and plug the internal antenna connection right into a modem which could lead to the issues.
The signal 4g is a wired booster that only does 15db amplification, it is designed to plug directly in and not damage modems. However all reports I have seen is there are not very many situations it helps over just a good MIMO antenna and could hurt performance most of the time. Mainly its going to help transmit power as the booster is getting it up around 1 watt, where as the modems are 300mw. Doing two for MIMO probably won’t help as I believe all current modems only transmit on one antenna, MIMO is on receive only.
Many people don’t understand that a amplifier always adds noise to the signal, the amount is adds is called the noise figure and you can usually find how much it adds in the amp specs. So on receive it amplifies the signal and the noise, then adds some of its own noise reducing the final SNR potentially giving you a worse result. The best place for an amp and where it has use is long runs from antenna to modem and the amp is close to the antenna allowing it to help overcome line losses.
If all LTE modems did 1 watt transmit like FirstNet modems I don’t think there would be any need for a booster in most any situation.