I'm looking for a petite rabbit-style or penetrative vibe. Was intrigued by descriptions of the Vibratex Charmer and Littke Kiss, but I also heard on this forum that they're prone to breakage. It's pretty hard for me to replace toys, so are there more durable alternatives?

Fun Factory has many pocket designs, and they are usually good quality.
The mini vibrators include a small version of the famous worm, and two more g-spot oriented designes, a miniature dolfhin (dolphin is great!) and a ridiculous, very amusing bug-like vibrator.

I swear I am not paid from fun factory for the pubblicity, I just like them!

a hitachi magic wand with a silicone g spot attachment is a good smaller dildo with a vibe that is very strong.

and versatile!

some say the magic wand makes them numb, also opt for a extension cord with a dimmer attached. this will take some of the potency out of the buzz, and will also allow finer tuning for your..ahem sensibilities. =)

cheers
Nigel