I've tried India oven as well as a handful of other Indian buffets such as Chennai fusion grill, Nandini, and Delhi palace cuisine of India. Out of all those I'd have to say India oven is the best and it's only $9 for lunch!
Tons of meat and vegetarian options and they have the buffet area split into 'non vegetarian', 'vegetarian', and 'salad/dessert'. They bring fresh garlic Naan to the table and the curry tandoori and lamb are all well flavored. They even have mango Lassi included in the price!