Hi beattiesman .... while you wait for some feedback, here are links to our reviews of these complexes, just in case you haven't seen them:

http://www.holidaytruths.co.uk/reviews/spain/costa-blanca/benidorm/benimar-apartments/

http://www.holidaytruths.co.uk/reviews/spain/costa-blanca/benidorm/loixmar-apartments/

How quiet they might be could much depend on the time of year. When are you thinking of going ?

David

We stayed in the Loixmar a few years ago as it was a last minute very cheap deal.
It was September and was full of 18-30's type youngsters. It was quite noisy in the early hours when they returned. They also took over the pool during the day.
It could have changed now but I wouldn't stay there again. Try Gemelos XX11 which is more or less opposite. They get great reviews all the time.