I would personally do it the long way and take off the turbo. It's not hard, but is involved and takes some time. I will do a write up when I install my MAM DP.
I have my CS downpipe installed but I'm having problems with my EBC so I really can't tell you if it's making much difference. I'm spooling pretty quick now but the ebc is not working so I have to stay off the throttle till i figure out what's wrong.