The FAQ/DIY is a good place to start but I'll help you out.
If you must get a BOV, either get a genuine HKS SSQ from a reputable vendor like ECS Tuning or a hybrid valve that vents part and recirculates the rest.
http://www.ecstuning.com/Volkswagen-...ne/Intake/BOV/
If you go DV route, Forge is a good brand. I've heard a lot of good things about the Forge 007 valve or you could get the HKS SSQ and the recirc kit so you'll have your choice
http://www.ecstuning.com/Volkswagen-...iverter_Valve/




so if thats the route your goin for. but both valves are well known and good quality. Ps. diverters are generally cheaper.



