BetOnline (SBR rated A-) currently have no complaints levied against them and no processing issues to speak of at this time, which is a positive these days. The limits are $2,000 (Sides & Totals) which isn't bad at all really, however they will collar you if you start to hammer them at a pretty good clip (recreational book needless to say).
Their are a couple of things I don't like is that they charge roughly $50 for fedex checks and they don't do book-to-book transfers. They don't accept Moneybookers at all and the only way you can deposit in Neteller is if you give them all your info, including pin number, which I don't recommend doing.
Of course you do get the two signup options (big bonus or low vig) and they only accept U.S. funds these days.
Here are just a few of the things that they do offer.
Overnight Lines:
Yes
Reverse Run Lines:
No
5-inning lines:
Yes (ML & Totals)
Reduced Juice Totals:
No
Grand Salami Totals:
Yes
Team Totals:
No
Here are their money line breakdowns:
.10 up to -189
.15 up to -199
.20 up to -209
.30 up to 224