Congrats T. on 14 years!!
I can suggest a few places beginning with the Funky Little Kitchen as a few other people recommended. A friend of my best friend also just opened a BYO in the Skippack Village area which is getting rave reviews. I have not personally been there yet but I can't wait.. the website is www.restaurantrosalie.com.
In the other direction towards Reading is the Arbor Inn, it's just off Route 562. They are a cozy, mom and pop restaurant with terrific homemade food. Brian and I were just there last week since it was highly recommended to us and now we can't say enough good things about it.
Whatever you choose I hope you have a wonderful anniversary together!