You can have your idle and good drivability at the same time, by doing what others here had said, and be a little conservative on the cam...SUM-K1102, Advertised Duration 262/ 272, Lift .420/ .442, 204 214 dur @ .050. That would be as big as I would go for drivability, but that doesn't mean you can't go big on the exhaust. Go with some larger pipes, 2 1/2" at least, and some really low restrictive mufflers (if any) and turndowns. That will get you noticed, and you might even still have the power (with the smaller cam = more low torque) to spin the tires when you leave the cruise-in.
