Subjective pocket sketch of choices:
1) Gimmelwald--tiny amazing undeveloped mountain village full of Rick Steves fans (but that doesn't matter much, the scenery absorbs them).
2) Murren and Wengen--developed mountain resort towns in stunning locations; more food and lodging choices here than in Gimmelwald.
3) Laterbrunnen--Vally town, nearer to Interlaken and non-mountain rainy-day activities.
Gimmelwald and Murren are next to each other on the Schilthorn side of the valley. Wengen in on the Jungfrau side. Laterbrunnen is in the middle. However, unless you have zero interest in the Schilthorn, I don't think you save much logistical hassle by choosing one over the others.
Note that though I've visited all these places I have only slept in Gimmelwald. My take is whichever side of the valley you pick it is absolutely worth sleeping in the mountains.
It's a beautiful place, have fun!