Stage 2 without upgrading parts... hmmmm They have great reviews apart from one Audi TT owner who says they bricked his and charged him for the replacement. http://www.ttforum.co.uk/forum/viewtopic.php?f=19&t=728577&start=15
Their stage 2 is pushing out what you'd get from a stage 1 at RS Tuning. I'd just go there myself, it's not exactly far from Durham. Mine made 315 with no mods