A much more thorough answer than mine, but Rucka (who wrote the Question parts of 52) wrote the Cry for Blood story, which I think is pretty clearly a bridge between O'Neil and what happens in 52. So I would definitely recommend it after reading O'Neil - Rucka has said in interviews that it's pretty directly a followup on what O'Neil did (
http://www.vicsage.com/wp/interviews...a-part-2-of-5/)
The Tec 854-864 issues are the "Pipeline" story I was referring to. The backups are available on DCUniverse, but I dunno if they are included in Comixology's digital copies. The trade of that story is way, way out of print, though I recently got it secondhand. I think it suffers a bit from the backup format - 10 page chunks means that it lacks a throughline sometimes, and there's some elements that I think don't fully work in terms of character. But it's still quite good, and as a Huntress fan (obviously
) I think it's a very good read.