There are quite a few very happy ABIT KT7A owners on this forum, including myself. Before that, I built 6 KT7 non RAIDS, with no trouble out of any of them. Just look around the forum and you will see for yourself that most everyone that has received their KT7A is pleased with it.
As far as the Highpoint onboard RAID controller on the KT7A goes, I used the latest drivers, and had it up and running in a flash with very good performance. As far as stability, I have been putting this board through the wringer 24/7 running the Prime95 Torture test in the background at 146FSB, and running the Prime95 Torture test with the 3DMark2000 demo looping all night (sometimes longer) and have yet to see a crash or lockup. It rates a nice 8.5 on the Anandtech review, and as you have stated, has not gotten a bad one on any other site.
A short while ago a lot of people on this forum were going on a mass MSI Pro2A frenzy. Now there are legitimate issues popping up on this "wonder board" . I know first hand because I tried one myself.
I think that it is crazy for anyone to suggest that you return a board that you already have before you try it yourself. You could always send it back or exchange it if you do not like it.
The review on the MSI K7T Turbo was a pre-production board, which means it could be as good, better, or not as good as the reviewed board when they are available. (I think next month) The KT7A at this time is one of the few boards that do not have the problem of dropping the multiplier, and raising the FSB "out of the box" like some of the EPOX and others are having.
Bottom line: Do your research, talk with people that ACTUALLY have the EXACT model mobo that you are interested in, and make a choice.