For the ITIL V3 Expert I used Art Of Service’s e-learning program, and recommended it. If I were starting now I would seriously consider the HP VISPEL program. Candidates should probably should consider the 360 day license unless they have a lot of spare time to complete the 180 day program on time.
Regarding Lifecycle vs. Capability track, the Lifecycle track is more popular and aligned with the books. The Capability track uses other books for study, but is suitable for practitioners who will stay at Intermediate. Some certification figures are found on this site. I will update the stats once the June (mid-year) figures are released.