If speed is what you need, your search is over
I was with two of the large ISPs and they could not deliver, even marginally. Their helplines were cold and uninformed at best, quick to blame the target sites for the painfully slow speeds. Finally gave up and tried Viewquest. Speeds are 70% there during peak hours, through the roof on off peak. Aftersales is personal and warm, they do take pride in solving issues. The forum for highlighting issues was a great idea. Glad I switched.