Alright here is the deal......
You can build LS Turbo and still get high boost or you can go LS VTEC and get even more power. I have a B18C1 with CTR Cams, I haven't find out anything yet because I am in the midst of finishing the motor which is setup for Turbo (expecting more than 300 hp). The motor has forged internals large CC injectors and every little tuning and bolt on possible on it....
If you plan on building a turbo LS VTEC plan on spending alot of money most definitely go with forged internals, that goes goes for the LS Turbo too. As for horsepower numbers expect more than 55hp try at least a total of 300hp or more....... If you get the right bottom end and a built up head you will have a pretty stout motor. You might also want to look into injectors that will play a big part in the horsepwer game. If you need some more advice let me know......

I am going through what you want to do just without the LS Vtec I am instead building up my B18C1 that is near completion. But like I said before expect to be dumping alot of money and don't chince on anything. Less will break that way!

Roadtoad