Maybe even get Kermit to do a custom dump pipe, or jjr split or x-force bellmouth. The results will all be much the same. Quality would be the issue you want something that will last. Any high flowing cat will do the same job, or just go de-cat.
I have heard bad things about the apexi boost controllers. Best bet is to go for a blitz DSBC. I think there around 380 new and hold boost real well.
With these mods tuned with safc your looking around the 235-250 accurate hpatw as long as your fuel pump is ok.