I really liked the concept of Directbet.eu
For the first time betting there in small amounts to test my luck.
So wish my GOOD LUCK!
edit: Transaction fees (deposit) are killing me for every bet I'm placing.
It is one of the best sports book that accepts bitcoin as well as other major coins like Litecoin,Dash,Doge and ETH and if you feel like the bitcoin transaction fees are hurting your deposit ,you could very well use alternative coins which have a lower transaction fees and since you are waging small amounts it is better to try alt coins.