Im a big fan of the 96-98 cobra cams. They have the best power for the money. They have 24 degrees more duration than stock and have an offset grind to induce swirl, something the aftermarket cam manufacturers can't duplicate due to cost. You can buy a used set for around 1 to $200 bucks. You can buy them new from ford for around 170 each. You dont need exhaust cams. The 96-98 Cobra ex cams, 03-04 Cobra ex cams and the mach 1 ex cams are the same. As far as ease of installation, they all take a bit of work. In the end, it all depends on what your after. Could get the Comp stage 2 or 3 and pay $1500 or buy the 96-98 stockers and still enjoy a smooth idle and decent power.