BetFred has a max $250 sign-up bonus (100%). Players are not great there either. But you have to play $50 NL and above to clear the bonus. If you're interested in maybe moving up a level, this could be a good option, since the bonus clears at about $5 per hour per table -- a nice little backstop to have, to make you feel better about moving up. PM me if you have any questions about this site, it's a little unusual.

IIRC, you can the Paradise bonus at $25 NL.

Why don`t you try http://www.ImASpammer.com, i saw they give away a 200$ bonus on your first deposit and from my own experience the players there are all good cardplayers. give it a shot and tell me what u think.