one word of advice... unless your Tanabe exhaust is a JDM exhaust it won't work since the JDM downpipe is quite a bit shorter than what would be required.
The Flatt design looks pretty good though. Back when I got my JIC exhaust I was thinking about importing a JDM downpipe but they were all too much money because they weren't common as they are now so I ended up with a Godspeed pipe. But if you're going that route, why not just get the Vishnu downpipe if you're dead set on the Tanabe exhaust...