You'll find that most parts for a Crossfire cost a considerable amount more than most other cars of the same type. Mainly due to the fact that it's basically a Mercedes, also because they are relatively low numbers of production.

I've never had a problem with the brakes, other than a LOT of dust. I've done numerous trips down the dragstrip back-to back, and driven it hard on more than one occasion on the expressways of upper michigan (way north of 100MPH). Many people switch to Rotex Gold pads to minimize dust. I don't have 'em so I have no idea on performance.

Both of the most popular CAI's (NeedsWings and TVT) are single sided, not twins. Some people have fabbed their own from parts from Spectre, but the majority still draw underhood air. In my mind that is not a true CAI. I can only speak of the NeedsWings, as that is the only one I have experience with. It draws air from behind the grill and in front of the Radiator, making it a true CAI. It works very well, improving performance as well as sound. I doubt you'll find a unhappy NeedsWings customer, Rob takes good care of his customers, and has a huge following here and in the SRT-4 world.

As far as wheels......I wanted to change mine for aftermarket, but have since decided to stick with stock. I have no idea what your normal roads are like, but here in Michigan we assign ZIP codes to our potholes. On more than one occasion I hit a pothole so hard I just knew I had a blown out tire and a cracked rim. To my surprise, I have never suffered any rim damage or tire damage. (knock on wood) Our wheels are made by Ronal...they make a very solid wheel, and aftermarket Ronal wheels sell for a pretty high dollar amount.

I think that's about it for now.....it's been a long 18 hour day and I need some sleep.