The oh-so-brilliant Carrie Ann recommends the Form 3 to simulate oral sex in her review here
. The video review is excellent. Unfortunately it's currently out of stock, but I want one just based on Carrie Ann's review. If you're just looking for a clit vibe, Je Joue's Mimi or any of the Lelo clit vibes (Nea, Mia, Lily, Siri, Alia) are all good quality vibes with great warranties, depending on how much power you need.