What is the best form of remembrance (dhikr) after rising from bowing (ruku') when the Imam says, "Allah hears the one who praises Him"?

It is Sunnah (definition) for the worshiper to say, after the Imam says: "Samia Allahu liman hamidah (Allah hears those who praise Him)": "Rabbana wa lakal-hamd (Our Lord, and to You be all praise)" or "Allahumma Rabbana lakal-hamd (O Allah, our Lord, to You be all praise)" or "Rabbana lakal-hamd (Our Lord, to You be all praise)," based on the Prophet's (peace and blessings be upon him) saying: "And when he (the Imam) says, 'Samia Allahu liman hamidah,' then say: 'Rabbana wa lakal-hamd.'" It is also desirable to add to that what the Prophet (peace and blessings be upon him) used to say, such as: "Allahumma Rabbana lakal-hamd, mil'as-samawati wa mil'al-ardi wa mil'a ma shi'ta min shay'in ba'd, ahlath-thana'i wal-majd, ahaqqu ma qalal-'abdu, wa kulluna laka 'abd, la mani'a lima a'tayta, wa la yanfa'u dhal-jaddi minkal-jadd (O Allah, our Lord, to You be all praise, filling the heavens, filling the earth, and filling whatever else You wish thereafter. You are worthy of praise and glory, the truest thing a servant has said, and we are all Your servants. There is none to withhold what You have given, and the prosperity of the prosperous does not benefit them against You)."