Joined: May '09
Location: Denmark
Age: 39 (M)
Posts: 191
I don't know what is the best, but I can advise you to read their terms and conditions carefully. I myself only glanced at it, and later I was rejected the no deposit signup bonus at William Hill. Apparently there are some rules that says any player using pounds and is not from UK is not allowed to get the bonus. A number of other strange clauses exist too.
The offer itself looks okay though. 30 pounds and you have to play it through 20 times (600). I don't know the exact rules with regards to that, but with a little bankrollmanagement it should be possible by playing the roulette.