Dominican republic trip. Need help with resorts.?

Question

I am going to the Dominican Republic with my girlfriend and have never planned a trip. We have been trying to find a resort to go to. We want one where we are able to do many other things then simply sit around on the beach as we are both athletic people. We have been looking at the Riu Bachata, Riu Mambo and Riu Merengue. I stumbled across these and they seemed nice and were rated well. Has anyone gone to them? Any other suggestions. we are looking at the Puerto Plata area. Thanks