I want my pad stash to last as long as possible.

Silk doesn't have the greatest longevity. Hemp is more durable than cotton, and flannel tops may wear out before flat cotton or terry tops do.
Recommended materials: No silk. Hemp cores. Flat cotton tops

It's important for my pads to dry quickly.

The longest any of these pads will take to dry is about as long as a pair of jeans would take. Hemp jersey is the slowest drying material that I use, and flannel is the fastest. Trifold Soakers dry more quickly than Standard Soakers. All others are about the same.

Recommended Materials: Silk tops, flannel tops, cotton terry cores, hemp terry cores.
Recommended Pieces: Trifold Soakers instead of Standard Soakers.

I'm concerned about odors.

If you've had problems with odiforous disposable pads, you'll most likely be pleasantly surprised when you start using cloth. Most of the vaginal bacteria that cause odors are anaerobic, so they are much more likely to proliferate when trapped in a paper and plastic pad.

To avoid odors in cloth pads, use all-natural materials as much as possible, and try changing thin pads frequently rather than trying to make a thicker pad last all day.

Recommended Materials: cotton and hemp. Only use synthetic fleece or PUL if you are dealing with heavy and/or watery flow.

I like my pads so thin I can't even feel them.

Hemp terry absorbs just as much as cotton terry and is a lot thinner, although it has less surface area and therefore doesn't absorb as fast. PUL backing is great if you want a super thin pad that you can wear for a long time between changes.

I like the security of a soft fluffy pad, thank you.

Cotton terry cores make a pad soft and fluffy.