I think overall you're safe with any of the RS or K cabs. I heard the BH250 with a RS410 and was blown away. I've rediscovered the BH800 recently and am really liking it. I'm probably going for a different tonal goal, but I'm using mine with a pair of Euphonic Audio NL112s and just purchased a pair of Trickfish TF112s that I'm looking forward to trying. The BH550 and BH800 are very underrated mainly because most people that try them don't understand the EQ as it's not as straight forward as it looks.