Social Shopping Sites/Shopping Comparison Sites?

I posted on here earlier about Shopping Comparison sites such as Nexttag, Bizrate, Shopping.com, etc. but also now am wondering about Social Shopping Sites such as Kaboodle, ShopWiki, ThisNext, and DealBundle.
Going into the holiday season plus with the economy we have done a lot of analyzing of marketing options.
We are just wondering about different social shopping sites and if most people have better experience with them than Shopping Comparison Sites or which social shopping sites are best. I'm also open to any opinions of the various Shopping Comparison Sites.
Thanks for any advice.