Re: I would make the move...
IIRC Gigaclear are the ones who did the fibre to my parents village (from >1MB dsl to 100MB fibre), and it works ok for them. The prices for full GB looked pretty reasonable as well (£60-80/month IIRC), although my folks have their cheapest tier.
They also moved to the bundled Vonage VoIP phone which is pretty crap to be honest.