Here's how it looks after replacing the VP100 with a VP150. You see 4 finishes here. If the EP350 was in the picture, there would be a total of 5 different finishes. And no, the wall isn't pink, it's much darker in real life and is called Clay Pot.
Sound quality change: Only very slightly increased bass response, yet noticeable. More of a center channel presence. Louder. You can tell there is a lot more sound coming from the VP150 than there is from the M2, so dialog is not centered and more focused downward that it was with the VP100. So far, I prefer the VP150 over the VP100.
Off axis, the M2 fills in nicely as I had assumed it would.