What a nice and thoughtful boyfriend you are! A man who doesn't feel threatened by dildos is a confident man, and that's a turn on right there. But to answer your question -
As you've seen, there's sooo many toys to choose from. Luna seemed to like the popular Rabbit, which looks very similar to the Firefly, though I've never tried one like that. I personally prefer not so many bells and whistles.
For external vibrators, one of the Candida Royalle's
Natural Contours is a good bet, and they are high quality, solidly constructed at a reasonable price ($25.-$30.) The Eroscillator is probably the best, but is around $100.
For a dildo, my personal favorite is a just a plain red jelly one, though it's rather small and thin. and ultra-smooth. I looked for it online, but couldn't find one exactly like it. I'll keep looking though, because I'd like to get another. I drilled a hole in the bottom of mine and stuck it on my Sybian, heh heh. If she prefers larger, realistic ones, the Peter North is a good one, and well made. Happy holidays to you and your girlfriend!
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