The Oyster remote vibe is by far the best in this category. I bought mine for my wife a couple of years ago when the manufacturer was the only one distributing it. Since then it has been featured on several UK adult tv shows and it is available through tons of UK distributors (though none in the US AFAIK). They have a model with a bullet as well as the oyster available
here. The cost is around $108 plus shipping for the dual model above, kind of steep but cheaper than a lot of other forms of adult entertainment =) Especially since it can be used for a long time. Btw it is virtually silent on all but the top speed (which is a bit too intense for the misses).