Hey guys, I've been doing some research about both of these choices for a while now and I've come to the conclusion that the B20Z gets about the same power as the factory bolt-on Greddy Turbo kit. So, now comes down to the price...I've pieced it out, and the B20Z swap will cost around $1200 or so with a B20Z engine, Si Tranny, LS ECU, LS Axles, LS Shift Linkages, LS Wiring Harness, and LS Mounts whereas the Greddy Turbo complete with intercooler will be around $2400 by doing the installation myself. Now, there are a few things that I am considering too...the first is that the Turbo Kit is easy to install and can be done in your driveway in around 8 or so hours, and the B20z is significantly cheaper and can also go farther. However, the Greddy Turbo kit can also give more power than the B20Z swap with a new Fuel Pump and perhaps a Hondata ECU. I'm leaning more towards the Turbo kit because it's fun to have a turbo and it's easier to do I think, but the B20z is just a hell of a lot cheaper and I can get some great power out of it too. I came here to ask you guys because I know I can get some good info. Please let me know your thoughts.