I've never actually heard of this movement. I read just now that it was founded in the 1800s. Could you tell us how it differs from the Gaudiya Vaishnava school, or some of it main tenets? I'd be very interested to learn about it.
It's good to have you around, I hope you decide to post more frequently
There are alot of differences between Gaudiya Vaishnavism and Arya Samaj, at least from what I perceive from its forefront.
GOD
Arya Samaj: God is a personal Being, but ultimately formless. All the different names in the Vedas (Indra, Varuna, Shiva, Vishnu, Brahma, Parvati, etc) are different manifestations of this singular God. All other conceptions of God that came later (Christian, Muslim, Sanatan Dharma) are considered either corrupted or base.
Gaudiya Vaishnavism: God is a personal Being, who also has a Personal Form. Krishna is considered the ultimate form of God, along with all vishnu-tattvas being underneath. Other personalities such as Brahma and Shiva are devatas, or demigods, and are created beings beneath the superiority of Vishnu/Krishna.
DEITIES/MURTIS
Arya Samaj: The usage of deities is strictly forbidden, and deity worship is considered an innovation, departure or corruption of Vedic religion. They arise from the naivete of the human mind and are completely base and primitive to the true Vedic worship. Agnihotra, or havans are the only form of ritual worship of the Lord.
Gaudiya Vaishnavism: Deity worship is a prominent feature of the religion. Mainly deities of Gaur-Nitai (Sri Chaitanya Mahaprabhu and Nityananda Prabhu) and Radha-Krishna are found common, as well as shalagram shilas. The Deity form of the Lord is considered a high representative of God's own form.
SCRIPTURES/SHASTRA
Arya Samaj: The only true Scriptures are the Veda (Rig, Sama, Yajur, Atharva) and Upanishads. Certain other writings such as the Srimad Bhagavad-Gita, Mahabharat, Ramayan, etc. are to be taken as inspirational, but not as Scripture. The Bible and Qur'an and Puranas are considered superstitious and written by men who have no conception of the Lord.
Gaudiya Vaishnavism: Scriptures common to Vaishnavism includes the Bhagavad-Gita and Srimad-Bhagavatam; also part of the canon are Gaudiya works such as the Chaitanya-Charitamrta, the Upadeshamrta, Hari-Bhakta-Vilas, Chaitanya-Bhagavata, etc. The Bible and Qur'an are tolerated as lesser shastra, since they were inspired by Jesus and Muhammad, both considered shaktyavesh-avatars (empowered messengers) of Krishna, but according to kaladeshapatra (time, place and circumstance; in other words, not eternal).
That is what I could find so far concerning them... the thing is, could it be entirely possible that the usage of deities (murtis) be a historical innovation to Vedic culture? That although I am already convinced of the legitimacy of the Vedic writings, could it be that other Scriptures such as the Puranas are downright superstitious and play on people's ignorance?
The only thing that is holding me back from joining Arya Samaj for shaking my faith is that so many saints have chosen or verified Vaishnavism as the path to the Lord: Ramanujacharya, Madhvacharya, Vishnuswami, Nimbarkacharya, Sri Chaitanya Mahaprabhu, etc. have accepted that Vaishnavism is a way of life for those desiring to develop their love of God. While Arya Samaj is a very very recent thing...
Although they do seem to posit good points...