We just moved to Cabarete and are renting in Ocean Dream. Very nice, very secure, and right on the beach. Beware if you rent a studio in 108 Kite Drive, you will hear a constant noise of traffic. Not horrible, but something to be forewarned of.
When looking for long-term rentals, our favorite place we walked through was Hotel Magnifico right on the beach. A bummer they don't rent long-term, but for a visit I'd definitely recommend it just from the walk through we did. You can check them out on the web at
Hotel El Magnifico in Cabarete, Dominican Republic
Just from our walks on the beach, Velero does look very nice and is right next to Janet's supermarket.
Best of luck picking the right spot and enjoy your visit!