Sorry Yoel, just saw that. First, whatever Mark said I heartily agree with. Vino Socca I haven't tried yet but given Yossie's and Mark's recommendations I believe it's great. I had a great meal at Olive Leaf two months ago. BTW get yourself a bottle of 08 Ella Valley CabSav while you're here, great stuff and QPR, and Olive Leaf have BYOB. If you can't make it to my shop in Jeru, even though I won't be there anyway I may recommend a place in TLV where to get wine (all K that said).
Now regarding restaurants in Jeru:
1) La Régence at KD Hotel.
2) Scala at David Citadel Hotel.
3) Rooftop at Mamilla Hotel (go there anyway even just to check it out, view is priceless).
4) Cañela on Shlomtzion Hamalka St