A couple weekends ago, I went to the newish Kohinoor Palace
Indian restaurant across from the Dayton Mall. (It's in that shopping strip with the halal grocery and A Taste of the Mediterranean.)
The weekend buffet is more expensive (around $11-12/person, I think it was), but well worth it-- especially if you want to get a sampling of southern Indian cuisine. I was surprised and pleased to see dosas on the buffet line, nicely crisp and filled with a spiced lentil/potato mixture. They had something called "Sikh kebabs" that tasted like sausage with sauteed onions and peppers (very accessible even if you don't ordinarily like Indian food, IMO), a tasty chickpea curry, an excellent
goat curry, as well as the usual tandoori chicken, butter chicken curry (basically, chicken tikka masala), saag, lentils, pakoras, etc. Along with naan, they had a puffy deep-fried bread that was delicious.
It tasted/looked a bit more homestyle: the saag isn't pureed as finely, and overall the dishes seemed to be less rich than usual, which is fine by me. Even so, I didn't have room for a return trip to the buffet line. :) Everything was well-seasoned, but not particularly spicy.
39 S. Springboro Pike
Miamisburg, OH 45342 http://www.kohinoorpalace.com/Default.aspx
Not sure if the weekday buffet will have as many items, but I'll definitely check it out sometime. Highly recommended if you love Indian food, and their menu isn't just another clone of Amar India's. (Which is also good, but I find their buffet a little bland and not as interesting.)