Most of the guys that I know went with Wagner's... Some with Apikol. They're same price give it or take and very similar in performance. Wagner's doo come with CF shrouds and custom grills for fog light delete and are a bit larger then Apikol, probably a better performer overall.
I'm not sure which 034 ICs you looked at, but they're not for RS6, they don't have option for V8TT, only V6TT iIRC.
I think AMD also caries intercoolers for the beast.