I use betfair as I can get set and not worried about being banned from a bookie. My turnover flags me straight away and there is no reason for me to even try with the bookies anymore.

If you are able to get the best price offered you have won half the battle and should win long term with a winning selection process but in the end if your successful then your going to be down to a limited few options which are tote or betfair (and some very rare bookies that are almost as rare as unicorns).