Welcome to the dark side!
The first thing you should expect is that fly fishing is going to cost a bit more money than spin fishing, but I bet you'll enjoy it more. There's a reason all of your buddies have switched over!
St Croix makes excellent rods and you will probably be very happy with the Premier combo. Redington also makes some excellent rods. You should also look at TFO and Cortland. This isn't a complete list, but one of these four manufacturers should have something you like. Are there any fly shops near you where you can try out a few different rods? Everybody has their own taste in rod action so it would be ideal if you can cast a few.