If you play at Bookmaker make sure you get taken off their call list or you'll be called in no time.
I have a love/hate relationship w/ Bookmaker which I won't get into (has to do w/ the retroactive predatory terms w/ their affiliate program.)
Despite that, they PAY, BOTH 5Dimes and Bookmaker PAY !!!!
If you like betting exotics and props your better w/ 5Dimes by all means though.
If your concern is getting paid, both will pay. If you like playing poker w/ your sportsbook well they both are terrible (that's because they share the same network/platform.)
You should always have more than one account any ways and both are solid. You never want to limit yourself to one Book as you should always shop lines. 1/2 points make big $$$ differences to your bankroll even in the short term.
But go w/ both and you can decide which one suits you better.
If you are only going to use one, it would depend on the type of player you are (rec vs pro). 5-Dimes is ideal for recreational while BM is more suited for pros.
The 2 books I use the most and definitely suggest both. Big difference is juice on 5-Dimes is almost always better and they have more wagering options available, while Bookmaker has better limits. Go with both!
Bookmaker is not afraid to take action. 5dimes is a pussy book that will cut your limits, put a delay on your wagers, and try to screw you on prop bets.