I've moved several times over the years...
... From BT to Eclipse. From Eclipse (locked to BT network at the time) to Bulldog. In a new location, from Bulldog (who didn't serve it) back to Eclipse, and then after a decade there to A&A. I don't regret any of the moves. As much as the Exeter bunch were lovely (and their tech support truly was great at the time), A&A gives me what I want... raw wire for DSL only, none of this "100 minutes of phone service and all the bundled goodies that I pay for and I'll never use" crap!