Nobody really talks about it much, but
www.wagermall.com looks like a no-brainer to me. 12 sportsbooks in one. You get the best odds and best lines available from any of them at any time. I'm currently not playing, so I don't use them and can't give them a testimonial, but unless somebody has something bad to say about them, go with them in combination with sportsbook.com and possibly badlands or regency for a really good combination of available lines.