I've been to both Javea and Denia and like both. We are not in Cabo Roig but on the Mar Menor Golf Resort which is 20mins south. We have friends who have owned at CR for ages. Recently having retired early we managed to meet up with them a few times and got to explore the area a bit. I do stress the beachside is the best side, as near as you can get to it. It is definitely cheaper the further south you go. Probably for a reason though, ie not as popular/less facilities.
I'm sure you'll make the right decision for you. Happy hunting