Okay, here is a link to the better quality thimble I mentioned:
http://www.aztec-rose-crea.com/thimb...ml?language=en
This is one of the best thimbles assuming you push on the needle with the tip of your finger (which is what I do). If you are uncertain about size, buy a little bigger because you can push some children's play clay into the tip if it's just a little too big. If it's too small, you can't use it.
The other type of thimble I loved was a leather thimble with the deep metal rim inserted into the top. It was comfortable to wear because it "hugged" the finger. I don't think they're made anymore, though. They were pricey and didn't last very long because the metal piece eventually came loose from the leather.
If you push with the side of your finger instead of the top, I don't know what thimble to recommend (although I would still look for deep dimples to help hold the eye end of the needle in place while you are pushing).
Here is the type of common thimble you want to avoid:
http://www.prym-consumer-china.com/english/thimbles/
It has shallow dimples and it's easy for the quilting needle to slip out of the top. It probably works fine for hand sewing, which is why it's so common.
I should mention I do try to protect my underneath finger from the needle pricks. I found the "tools" for this purpose always rather awkward and bulky, plus I think they dulled my needle faster. The "liquid skin" type things were never heavy enough for me. Overall, I think investing in some adhesive dots for the underneath finger is worthwhile. These might work:
http://www.amazon.com/Colorbok-Thimb...dp/B001J5JN7G/
Regarding the Aunt Becky's tool and other implements to be used underneath the quilt, I found that once I had enough "give" in the quilt (similar to what the thimble lady shows in her hoop video) they weren't necessary.