Avoid Priceline. Your flight times are likely to be terrible. You might save a few bucks, but not enough to make the trip at odd hours worthwhile. We have used Orbitz. Very happy with them. Our trip in December with SW was booked online at their web site. They have a great cancellation policy and price adjustments, but no assigned seats. We did cancel our trip in August and rebook for December with no penalty. There are tradeoffs for everything. We have also booked Airtran using their web site. We were very pleased with their service, flight times, etc. Actually got a free upgrade on a tirp during our Anniversary.
Just stay away from Priceline. Of course just my opinion here.
As for rooms, we use The Magic For Less
Travel agency. Deb is great there. She takes care of our reservations, dining reservations, recreation reservations, etc. All this great service for no fees. We won't book Disney without her.
Tickets...we usually buy through
AAA. I have also heard good things about the online ticket sites.
If all this sounds too much let Disney book a package for you. Of course even if I were booking a package, I would still use The Magic For Less to book with. Love them!