Make sure if you get an OBX you find an installer who has done several of them and knows what he's doing. Even though some feel that OBX has improved their quality they are still being shipped with defects. According to my installer the OBX is a Chinese made Quaife knock-off. He has installed about 20 of them and each time he's had to dissassemble them and make corrections and in some cases do machine work. So he charges more to install them. The Quaifes he just installs without taking them apart.
I understand the price difference is very tempting, but among other reasons I don't recommend the OBX is the fact they stole the design and because they are made in China, copyright protection cannot be enforced.