have you consider joining RCI - yes you are a member thru DVC - but if you can become a member on your own - they have some good sales - now their sales are generally in the off season. so early Feb, May, Late aug, Sept, sometimes Oct, Nov and early Dec.
you could also try skyauction.
now for reviews - you can join tug (it will cost you)
you can read the reviews on RCI w/o being a member
www.rci.com - resorts
or you can go to tripadvisor
now my favorites will be different than yours - like Westgate and Festiva because they accept pets.
others
Hilton Vacation Club both SW & ID
Sheraton Vistana Resort & Villages
Grand Beach
Cypress Pointe
Silver Lake
now if you are already a member of II - then RCI extra vacation/last call are cheaper than II getaways even for the same place and time.
one big exception is DVC - RCI is actually charging more for it than DVC or Disney do. this is cash = getaways.