I'm also planning to publish my favorite young adult series tomorrow which just about cleared out my good options. As a result, there are only three books I have to recommend, but I recommend them wholeheartedly.
The Hunger Games by Suzanne Collins: These books have probably been read by anyone who would already have any interest in reading them. However, the adventure, lovable characters, and fantasy aspects are a dead ringer if you liked Cinder.
Bridge to Terabithia by Katherine Paterson: It has been awhile since I've read this one, but I remember it fondly where few stand out. It is written for a slightly younger audience than Cinder and The Hunger Games. It is still a feel good, sweet, fantastical adventure.
Looking for Alaska by John Green: This young adult novel is a realistic portrayal of teenagers at a private boarding school. While I probably would not actually recommend it for a young adult - as it deals with some very heady, difficult topics - it is a very well written, adventure novel. It is not a feel good read, however.
Do you prefer feel good young adult reads? Or more realistic ones that deal with tough topics?