Thanks for a new site to check! I usually start at booking buddy and choose kayak and
www.carrentals.com. This gives me an idea of what the going rates are. However, I often end up at the rental car sites, using promo/coupons.
Explore
PS I would also check the link provided by SixAlpha. I understand the Orlando market is very competitive and MouseSavers.com may give you an edge in finding the best price.
PPS Here is a link to the Magicard. It may save you some money on your trip to Orlando.
http://www.orlandoinfo.com/magicard/download.cfm