I have recently become obsessed with strings and as far as my reading on the internet goes, Aravanecaravan is 100% point right in every point. As far as my experience goes I have only played with Dunlop Silk which is ok, but moves a lot and loses tension soon. Also I have had a hybrid of Dunlop Explosive and Babolat Synthetic Gut which was good enough for spin.
If you want more spin, you should definitely go for a thinner string. As far as the info on this site goes, the textured strings are the best for spin.
http://www.stringforum.net/about_strings.php
You can search and read reviews on strings here too:
http://www.stringforum.net/stringdb.php