Pink, despite its reputation for prostitution and late night clubs, Sosua is a nice place. You will probably get propositioned... my wife and one of her friends were approached for some sanky panky this past March. Just remember that the DR isn't the US, and the social cues and police coverage aren't what you're used to. I don't know how much travel you've done, but it's just different here. There are people that will take advantage of you anywhere in the world... but there are more opportunities in places that have experienced decades of high employment and too much TV.
With that said, there's a great little hotel called Casa Valaria in downtown Sosua... it's centrally located, walking distance to the beach, and has a nice restaurant attached. The registration staff are fluent English speakers, the owners are European, and they might be good resources of information. I can't remember the exact prices, but it's like US$55-65/nite, non-inclusive. You should also be aware that people get sick from the food at resorts... they put the food out buffet-style, and often it's not kept either hot enough or cold enough to be healthy. Plus, the resorts are... um... kinda like Disneyland.
Do your homework. Do it for real! Find out what kind of crazy junk has happened at the clubs you want to visit... the club scene is where a lot of the violent crime in the DR happens. Know that people will try to sell you whatever they think they can try to sell you, and with a ridiculous amount of persistence.
Have a good time with it! It's beautiful down here, and when the weather is oppressive in North America, the water here is still nice and warm, the sun is still out, and you can still get a tan :0)