Janet, Hotel Blumental is in the center of Murren not too far from the cable-car station. It has something of a traditional Swiss chalet appearance and a restaurant with outdoor street-side seating. (If the restaurant is getting no business, the server standing in the doorway will try to entice you to eat there. The food is reportedly very good.) Hotel Alpina is on the eastern end of Murren, farther from the train station. It sits literally right on the edge of the cliff. So if you have a cliffside room, you will have the most awesome views from your balcony--not just across to the Eiger, Monch, and Jungfrau but also down (2000-feet down!) into the valley. I do not know about Bob's except if I remember correctly, it is just down the slope from the cable-car station on the foot path between Murren and Gimmelwald. More like a Swiss home, as I recall.
There is a Coop supermarket a little way up the hill from the cable-car station and down from the Blumental. There you can find whatever you need for breakfast of lunch or preparing your own meal. Swiss chocolate! The Coop is closed over lunch hour, so you don't want to duck in at noon expecting to pick up lunch items then.
The most popular restaurant is the Stagerstubli which is near the Coop. It is where you will find most people eating either inside or outside. (In September it will most likely be cool outside in the evening. Have a light jacket if you choose to eat on the terrace.) Dinner prices are in the $25-30/person range; wine or beer extra. That's a typical price for Murren restaurant dinners. By the way, most restaurants, except the Stagerstubli, are in the hotels.