Can't really see how it's any different to what most people do as such mate tbh, turbo choice as you point out probably wouldn't be most peoples choice. 200bhp doesn't sound unachievable as it's a pretty good spec you've got, you'll need to run plenty of boost if you want big torque figures though, and i 100% agree about the management swap...you're really never gonna see the potential without it, stock engine could see 200bhp reliably so almost overkill with your spec for that power imo.