Phnom Penh offers four noodle soups that are similar to pho. I tried the S11 Spicy Rice Noodle (Chicken, Meat Balls, Ground Pork, and Shrimps). Very nice indeed! Fairly tasty broth, good spice level, with a generous proportion of hearty noodles. Two shrimp, two or three slices of chicken, and a pile of meatballs kept things interesting.
Here is their famous Golden Chicken curry. I remember enjoying it but not quite as much as I'd hoped given all the rave reviews. Now that I've lowered your expectations a bit you will love it! ;-)