I have an Edition30 GTI and enjoy modding, but I just didn't want the noises and hassle associated with swapping out for an aftermarket one (including fuel trims and the fact the EA113 is an ugly ass engine which needs the nice OEM cover over it) - it only really works well on naturally aspirated cars in my opinion.
So I opted to install a Pipercross foam panel filter in mine - sounds superb, especially when hitting 5krpm+ - I highly recommend you go down this route, in my opinion foam filters sound nicer than paper and cotton gauze filters
.... Re fuel trims, easily catered for in the remap with APR aftermarket HP Fuel Pump. I have been running Revo Stage 2.5 for many years and consistently plot about 270bhp on the same DynoDynamics rolling road. It's all about achieving a good performance balance which is practical without overstressing things.
I designed my own engine cover which accommodates my Forge TwinTake and reduces the debris etc in the engine bay. The large diameter piped Forge TwinTake amplifies those glorious (to me) turbo sounds, especially with no bonnet sound-deadening panel. I like to hear everything which is going on and don't even ever play music or radio in any car I drive.
EngineBay by
Robin Procter, on Flickr