I went with the DC Sports 4-2-1 2pc Header, and I am very impressed overall.
While the install was time consuming, it went in perfectly, with no leaks whatsoever.

Power-wise, the car no longer struggles in the high end, and the exhaust note is very nice, reminiscent of the old Alfa Romeo GTV. h:

And yes, caveat emptor... I don't trust eBay at all, it seems like a haven for pirates and scammers. h: