St Cyril I came across on Monachos, St Athanasius is included in my Early Church Fathers series (though I'm not sure how far the translation carries Protestant ideology), and is also on that book table I keep asking so much about (I want it for that intro by one Clive Staples Lewis).
I wasn't sure how much of the texts Google books had up (I was disappointed with one or two of the others I came across, they left out parts in mid-argument) for Sts Gregory and Maximus, but I'll give them the twice over.
Here's another one: St John Cassian. One of his conferences (XXII) seems to be missing from every translation I've found. I'm something of a completionist and it's bugging me. I can understand from the title WHY it's missing, but if it's something important enough that one of the Fathers wrote on it, I want to read it! Compared to some of the other things I've read on the subject I doubt it will be all that offensive.
PS. It's ante-Nicene, not anti-Nicene 
I knew that. My fingers didn't.
P.S. While I've been past CCEL I didn't realize that they had such a wealth beyond the early fathers (though I knew they had stuff by Chesterton, Bunyan, and Luther), thanks for the head's up. And, yes, those debit cards come in handy. I have a slight problem with WAITING for stuff I order and mainly use mine for things like Netflix and X-Box Live, which are instantaneous. For that matter I suppose I could also order books through my local bookstore. Still, it annoys me that I can find 1,000 books on Roman Catholicism right now and only 1 on Orthodoxy, and that in order to find that one I've got to go through the 1,000.