What is the version of the following sentence with correct punctuation?

Once you have narrowed your decision down to a few of the best blackjack sites you can download free software and try out the games for free to decide which site you like best Once you have found the site that offers the top blackjack game for you sign up to play for real money or keep playing for free and have a blast
Once you have narrowed your decision down to a few of the best blackjack sites you can download free software and try out the games for free to decide which site you like best. Once you have found the site that offers the top blackjack game for you sign up to play for real money or keep playing for free and have a blast!