Yamaha THR100HD Stereo Setup

Hey Friends, Brand new here and complete newb to speakers and looking for your experience/help/advice/recommendations\roasts. I'm hoping someone else has this figured out. Just picked up a stereo amp, the THR100HD. 50W per speaker out and also combine up to 100w. Can switch ohms and a bunch of other stuff I haven't figured out yet. I would like to build 2 separate 2x12 cabs for that sweet stereo spread and panning for reverb, delay and modulation effects. I'd like each cab to be distinct but complementary. I'm using this amp as a pedal platform and while this amp does modelling stuff I'm not interested in that. I called WGS and they graciously answered some of my questions and recommended getting started with a Reaper HP and a G12C/S. I'm an at home player since I'm mediocre and there's not many other doomgazers in the area. As far as pedals, I'm running a Crooked Teeth stereo trem, Zoia, BAT Pharoah, Blackhawk Balrog and EHX stuff for delay and reverb through a Boss ES8.