Welcome to the forum mate. we are all rilly nice people here rilly
Have a little look in the search button on here as this will show you a lot of link to the same question you have asked before.
But to quickly anser you question try and get one before the map as you will know then that its a new part will not corse any problem and as for the benafits thay ushaly last a bit longer than the VW ones and can be alterd to your requiaments. Forge are the best for the 1.8t so have a look on htere web site or keep you eyes pealed in the classifides adds on the forums