Del Posto or Lupa?
Both have excellent food, but the spaces and approaches are entirely different. If you want something more casual and raucous, go to Lupa. If you want something more refined, do Del Posto. And if you want refined, but slightly less stuffy and expensive, do the enoteca at Del Posto. Any of them will serve you great food, especially the pastas and wines. Personally, I'd pick Lupa for dinner with friends and Del Posto for dinner with my family.