RWC has been a nightmare for me without my SDS100. BCD436HP just wouldn't give me Simulcast A-C in my portion of the Southeast Valley due to simulcast issues. (The BCD436HP was fine with Simulcast F/H ... Tempe and Scottsdale, however).
I've also started using a couple of RTL-SDR (v3) with DSD+ Fastlane and have been impressed at its ability to deal with RWC.
The SDS100 and the SDR options have been my only means to listen to the various K Deck Talkgroups. I'm not familiar with HP1's performance myself.