+2 for mgreen27
Anything other than vertical bi-amp is a train wreck. This has been discussed in numerous posts and I recall one that a well known and respected amplifier designer commented that the horizontal configuration would never come close to working without an active crossover and then it still may not work well.
"I hear you on bridging and understand distortion levels go up, phase issues, etc. Still willing to try nonetheless...won’t kill me to do so...I have options."
Keep in mind that a bridged amp sees the speaker's impedance as half of the actual value. With the VR4's being 6 ohm, that's a 3 ohm load. No, it won't kill you, but may kill an amp. Always best to only use 8 ohm speakers with a bridged amp.
Have you thought about an upgrade for the main power cord? The one from the breaker box to the outlet for the system. This system would benefit from a dedicated line, two even better, one analog and one digital for better isolation with upgraded outlets.