What did you not like of Abeka after 2nd grade?
I felt like they started dumbing the math down. I had taught 1-3rd grade before I was married, and really liked it (ABeka). But when my son got closer to that age, I noticed that things were beginning to look more like comic books, and it didn't seem as though they were learning as much as they should have (some of it was what they had learned in 1st grade when I was teaching school). I was not as unhappy with the english curriculum, so stayed with that through 3rd grade (I found something that worked better for us - Beka's english is good). I have always liked their Science, though. And their History is good, but I had to add a lot that I felt wasn't included (did that even when I was teaching, but most teachers do, with any curriculum).
And I wasn't crazy about some of their readers - they had simply bought the copyright from Macmillan, and so some of the stories weren't what we wanted our son to read. So we went to the library a lot!
I thought I was alone in that opinion, but have since found out that I wasn't. But there are still people who love ABeka all the way through - I think it's really a personal preference thing.
But as I said before, their pre-k material is good!