Lagos is a good place to overwinter. Excellent social life, very friendly Brit community that organises a number of excellent social events, plus a regular radio net that provides advice, hints and tips etc.

Sopromar is an OK yard, but not the cheapest. Good chandlery and friendly folk. The hardstanding is usually pretty packed over winter. I guess hardstanding would be cheaper than on the water, but check with the marina about a berth on the pontoon. We got an excellent six month deal running October to April and the advantage of the pontoon is that you are close to showers, loos, shops, bars and restaurants. If they still have the lone guitarist singer who entertains in Lazyjacks it may we worth investing in a rifle to take him out when it gets too much! Seriously though, it's generally pretty quiet.
Albufeira and Portimao are less attractive and a bit remote from shops etc but both were offering good deals for overwintering. Vilamoura, further round the coast is big and busy and quite expensive.

As you now have the time, don't hurry down. Enjoy Brittany, Northern Spain, and the Atlantic coasts of Portugal and Spain. We took four months and wished we had taken longer.

Good luck