I would certainly have to agree that All Saints is a good choice for an inquirer since the majority of the parish is converts, very few cradles.... They are also probably one of the most knowledgable congregations on Orthodoxy in the city. In addition, their outreach is tremendous, they've sent more missionaries than all the Chicago churches combined!
As far as Holy Trinity and Christ the Savior, having extensive experience with both, I cannot recommend either one. The people at Christ The Savior are somewhat unfriendly, especially some of the choir folk. The only positive is that the majority of the congregation is young people or college students. As for Holy Trinity, the people there are majorily old and generally less friendly, and the church itself is probably going to cease to exist in the next 2 years due to less than competent management by the Priest, and Parish Council.