5dimes' site is in the stone age, and their customer support is garbage, but it's really reliable overall and they offer the most betting options I've ever seen for American bettors.
Bovada is good if you want to just deposit a quick $20-$30 and get down, but their sportsbook has nothing but square lines and limited options. Their website is beautiful though n/h.
Personally though I use Youwager.eu, they're my favorite site because their CS is cool, payouts are literally same-day no bullshyt, and I like their site for the most part.
They offer a shyt ton of free money bonuses with no rollover either. Check them out and depending on how much you wager, make your decision.
I'm a degenerate internet gambler so any questions you got about betting on the internet don't hesitate to PM or reply directly to the gawd
