Barny,

I don't use any commercial dataabase. I use my own that I wrote myself. There is a free one here. But you won't get any support or help instqalling it and no back data. But its free.

It going to depend on what you want and what price you are willing to pay upfront and ongoing. I always hear a lot of good stuff about Betselector although its pricey and I have heard Chromes Princes is good if you want something a bit cheaper.