The midpipe is good to get but I think the downpipe would probably be the better of the two. The downpipe gets ride of the convertor that is a few inches away from the turbo. I did both the midpipe and downpipe and I can tell the turbo spools faster. I also get a lot of turbo spooling noise through the exhaust.
Thanks! I'm debating on whether or not it's worth doing at all. I have the K&N which sounds good and what not but dropping a bucket of coin on a tune because of the DP? I dunno. Does the midpipe alone give it a throatier sound?