Virgin Media is fibre to the node, still coax into the home. Plus can be congested in areas and if your property does not already have it installed it is very hard to get. Does Virgin say you can have thier 50 or 100 Meg service, avoid their National service.
The slower/cheaper virgin options do have throttling. Only their premium 50 and 100Meg are clear.
Why waited two months, a long time if downloads are crucial for work.
Be/Sky are fine, Sky is more a joe average product, Be tends to be more a geeks choice.