OPV353

Hi all! First post as well (new member ) I actually wanted to start a new topic but, this one seems appropriate. So, last winter I completely restored my 204 350z from wheel arches down, PU bushings, ball joints, brake lines, pads....cleaned the rust etc. Since then I drove aprox 3000 miles when I decided I should go on a track day event (Cadwell park - fantastic circuit!!!), 3 sesions, 4 laps each. When I arrived home a knock, like the one described above. Soooo frustrated since I worked one month in a rented garage from 4pm to 10 pm each day...and, most important, no apparent reason. After I took the suspension apart on one side, I discovered that my track arms (banana arms) are dead!!! The thing is, if you check them the usual way for play...they seem are OK. Pull them off the carrier, check them free, no tension. Well. I will not complain since I bought them cheap. This is my problem, may be it is yours too. Now, I'm searching for a very good pair of track arms. Can you guys help me decide? I want to track day this car. Are OEM enough? Borg & Beck? First line? Thank you!