Depends on what kind of bettor you are. If you know who you want to throw cash on hours before the games take place and do your own capping, a place like Matchbook probably suits you because more times than none, they have the best price on both sides. 5dimes has .05 cent overnight lines, and BetPhoenix + BetJamaica have .10 cent lines which are also good if for whatever reason can't get in at Matchbook.
If you're an "off-market numbers" guy, ABC Islands / Jazz / Loose Lines, WSEX, and SIA are must haves because they're opinionated with their lines. I'd keep some cash in CRIS / Bookmaker and Bodog if this is your style, because they are notorious for keeping lines on there "just a few minutes after 7:05" in case you miss a pick at the last minute.