A measuring stick for a book: does it take 3 dimes in one shot on NBA, NFL and MLB?
Oly
Pinny
Cris
Mansion **
Cris
WWTS (phone only)
and curiously enough, Skybook.
Not on the list are Canbet. As Krackman observed, it is pointless for a pro to keep money there.
On the "maybe" list in Hollywood. They usually have decent game-day limits, but they often delay lifting the overnight limits until line movements have eaten up a lot of your equity.
Mansion is a mixed bag. Great limits, and great prices. You can tell they sunk some serious money on their site - it is very professional, and the deposit interface is lightning fast. That said, they don't have the "Sharp factor" - 105 pricing, as well as the consistently having the best price on a sharp side would suggest this book will have problems long-term.