I was just now browsing the modules at HopeRF and noticed there's a new, enhanced power version of the RFM95PW that can Tx at 30db: http://www.hoperf.com/rf_transceiver/Enhanced_Power/RFM95PW.html
Even without the enhanced power, the LoRa range was fantastic. I'd expect the range of this enhanced power version to be truly amazing.