Great thoughts here! Very similar to what I wrote. If you get the opportunity, go visit these churches in DC:
Capital Hill Baptist – their hymns on Sunday morning at amazing.
Holy Comforter Catholic Church – a vibrant African-American Catholic Church on the Hill.
The Crypt Church below the Catholic Basilica – underground, mysterious, solemn.
Falls Church Anglican – VP Pence’s church and an interesting mix of Modern Protestantism and traditional liturgy.
The Dominican House of Studies – amazing Easter services.
St Peter and St Paul Coptic Church in Arlington area – I’m good friends with the priest’s brother, and have been there a few times. An amazing opportunity to step into Egyptian Christian traditions.