By 10K I'm assuming you mean that's your sportsbetting bankroll, not what you want to bet per game. Either way, if you have that much money there's no sense in putting it all in one book. Look for the book with the best odds for the game you want to bet and get your money down on the best line.
Here are a few reputable ones that offer good odds.
www.pinnaclesports.com
www.hollywood107.com
www.thegreek.com
www.betcris.com
www.betwwts.com
www.5dimes.com