flowtech junk. no name ebay headers junk. summit headers like I said some guys really like them for the price, summit stands buy their stuff usually(probally the only low buck header I would trust). you probally wouldn't be unhappy with any of the major brands like.
Like I wrote watch out for the headers that don't have a full one piece flange like mac and I think bassani, they are good headers just a real pain to seal. make sure you get good gaskets like felpro's that is key also, don't use junk cheapies they will leak no matter what headers.
hopefully some the other guys jump in, good luck!