It seems to me that a lot of postings are just saying "I live in XYZ...what a lucky chappie I am" without really addressing the question posed. for a start Torrevieja is considerably more built up than was requested and surely CDS is a complete non-starter.
Isn't Palomares where there was a nuclear accident in the 70's involving the USA ? Personally I would steer clear of that part of Almeria out of principle, even though I'm sure it's said to be completely OK.
If the cold winters are an issue then yes the Canaries is a good call, but the housing and living costs are very expensive and it was kind of implied that mainland Spain was sought.
To an extent it seems to be true that the further south the milder it is in winter, being close to the coast also avoids the extreme cold, so given these thoughts I would have a look at villages around Agulias and although I do not know the place myself the suggestion of San Juan de los Terreros might be a good starting point..
Enjoy your hunting - interested to hear where you try etc.