I had a (severely) cracked header and the shop only had motivator 4-2-1 extractors (by walker or lukey-not sure which) in stock, so I got those for about $320 fitted.
Genie stainless were about $340 but it would have been a delay to get them in, therefore no car for about 4 days (over weekend).
Also could have got Hitech's for about the same price as genie, but the shop said although they are good performance wise, they use very thin metal, prone to wearing out quicker.
Once I got extractors, the gap in rev range at 2500-2800 was heaps bigger, therefore I recomend getting the chip for 2.4L engines of Adam which removes the gap, among other things.