Is it true that chanting Om is best while we are doing meditation, or should we chant Lord Ram’s name?

Is it true that chanting Om is best while we are doing meditation, or should we chant Lord Ram’s name? Well Om itself originates from Rama. The name Rama is the cause of Omkara itself. Shri Rama himself is Parabrahma Maha Vishnu. His name is eternal and infinite. Even when Omkara is chanted it is Shri Rama himself who is actually worshipped. The cosmos takes refuge in the two lettered name of Shri Raghunandan. His name is the cause of all names. Sushruta Samhita Chapter 1 - Lord Shiva says कारणं प्रणवस्यापि रामनाम जगद्गुरुः । तस्माद् ध्येयं सदा चित्ते यतिभिः शुद्धमानसैः ॥ The cause of the oṁkāra is Jagadguru Rām-Naam, therefore the pure-minded Yatis should constantly meditate on Rāma-Naam in their minds. Yajurvedā Shäkhayam RāmRahāshyopanishād तेषु चैव सर्वेषु तत्त्वं च ब्रह्म तारकम् । राम एव परं ब्रह्म राम एव परं तपः ।। राम एव परं तत्त्वं श्रीरामो ब्रह्म तारकम् ।। वायुत्रेणोक्तास्ते योगीन्द्रा ऋषयो विष्णुभक्ता हनूमन्तं पप्रच्छुः रामस्याङ्गानि नो ब्रूहीति । वायुपुत्रं विघ्नेशं वाणीं दुर्गां क्षेत्रपालकं सूर्यं चन्द्रं नारायणं नारसिंहं वायुदेवं वाराहं तत्सर्वान्त्समात्रान्त्सीतं लक्ष्मणं शत्रुघ्नं भरतं विभीषणं सुग्रीवमङ्गदं जाम्बवन्तं प्रणवमेतानि रामस्याङ्गानि जानीथाः In all the scriptures like Vedās, the supreme principle is 'Tāraka Rāma' in the form of Brāhman. Śrī Rāma is the Supreme Brāhman. Śrī Rāma is the supreme form. Śrī Rāma is the Supreme Being. Śrī Rāma is Tarakabrahma. Hanumān preached to the devotees of Śrī Hāri Vīshnu and other Rishis "I myself, Śrī Ganēshā, Goddess Saraswati, Goddess Durgā, All the Guardian (Khetra Pāl), Sun (Suryā), Moon, Lord Śrī Hāri Nāräyana, Lord Naräsimha, Lord Vāsudev (Śrī Krishnā), Lord Vāraha etc. all are the mere parts of Lord Śrī Rāma. Lakshmāna, Shātrughna, Bharata, Vibhishana, Sugriva, Angad, Jambavant and Pranav (Om ॐ) are also mere parts of Lord Śrī Rāma. Valmiki Ramayana Yuddha Khanda "You are the sacrificial performance. You are the sacred syllable ' Vashat' (on hearing which the Adhvaryu priest casts the oblation to a deity into the sacrificial fire). You are the mystic syllable 'OM'. You are higher than the highest. People neither know your end nor your origin nor who you are in reality. You appear in all created beings in the cattle and in brahmanas. You exist in all quarters, in the sky, in mountains and in rivers." "With thousand feet, with hundred heads and with thousand eyes along with Lakshmi the goddess of wealth, you bear the earth with all its created beings along with its mountains. O Rama! You appear as Sesha, a large serpent in water, at the earth's bottom, bearing the three worlds, gods, Gandharvas, the celestial musicians and the demons." "O Rama! I ( brahma) am your heart. Saraswathi, the goddess (of learning) is your tongue. O lord! The gods created by Brahma are the hair on all your limbs. Night has been recognized as the closing of your eye-lids and the day, as the opening of eye-lids. The correct usages of your words are the Vedas. Bereft of you, this visible universe does not exist." "The entire cosmos is your body. The earth constitutes your firmness. Fire is your anger. The moon constitutes your placidity. You are Lord Vishnu (who bears the mark Srivatsa - a curl of white hair on his breast). In the past, the three worlds were occupied by you in your three strides, after binding the exceptionally formidable Bali (the ruler of the three worlds) and Indra was made the king (by you)." "Seetha is no other than Goddess Lakshmi (the divine consort of Lord Vishnu), while you are Lord Vishnu. You are having a shining dark-blue hue. You are the Lord of created beings. For the destruction of Ravana, you entered a human body here, on this earth." Atharvaveda Rama Uttar Tapini Upanishad 1.4 श्रीरामचन्द्रमनुस्मरणेन गायत्र्याः शतसहस्त्राणि जप्तानि फलानि भवन्ति प्रणवानामयुतकोटिजपा भवन्ति । Merely just remembering Sri Ram Mantra one time is considered equal to chanting hundred thousands of Gayatri Mantras and Crores times of chanting Om. Thats why one must keep chanting the name Sita Rama with complete devotion