I have narrowed it down to these two companies for rear control arms. BMR are boxed only on the lower and cost 280 for the set. Hp motorsports cost 328 for the set but are boxed upper and lower. I know that a couple companies on this board would be better but I will probably end up taking the car to the track maybe once so I don't need the absolute best price not being an issue. Right now I am running stock so anything would be an improvement. I was wondering if I could tell the difference between the two? Any thoughts would be appreciated?