I have actually called them before, not sure who I talked to, but yea, they were definitely on the pricey side, i think, cause I haven't gotten a quote from anywhere else yet. But when I talked with him, he kept pushing me to go with more expensive stuff and switch out my whole system. I want to keep it simple, but he was probably laughing on the inside at me for my low end upgrade. He also said he owns a e92, but has never worked on e90s.
Mike at method sound also suggested slightly better (more expensive) system, but was happy to do exactly what I wanted.