Tour Group rec?

[yukitsukihana]

Trying to plan a trip to Japan in the spring (early-mid April), and I'd like to go with a tour group. Could anyone recommend a good group or operator to go with? Airfare and hotels are a must. Meals would be nice, and I'd like a group that centers around temples and onsen. Sakura-viewing would be lovely, too.

In other words, which group is the most trustworthy, and gets me the best deal?