Well, this is subjective and will depend on the opinion of everyone so the majority will say what's the best for them.

Have you tried playing in on bk8? If you haven't, you can take time and play with them to check it out. The two bookies that you've mentioned are also known.

But if there's someone who wants to check the other bookies, this is what's good in this community. There's a lot of choice that you can spend your time with to test almost all of them if you want to.