I currently have the M4 Turbo S models powered by a Denifrips DAC and Cherry inline mono amps. My room is 19 x 24 dedicated to 2 channel. Looking for input on upgrading to the Sapphire line. I supplement the M4s with a pair of GR open baffle dual 12” subs. With these subs supplementing the bottom frequencies, what would bee the rational or benefit of going to the M3s over the smaller models, including the M5s?