[xlr8or]

rsimoes,
Dreamer and Mitty make good points.
I see two major items:
1. How much you personally value of the CSX vin and signature. you pay a premium for it.
2. Who are you comfortable doing business with. There are people on the forum that will tell you they had great experiences and those that have issues with either company.

I am very happy with my Kirkham car and the company as a whole because they gave me the opportunity to get the car I wanted at a price I was happy with. Would I like to have a CSX car? Absolutely but I personally don't value the VIN and Signature as much as others on this forum and didn't want to pay for it.
Do what works best for you. They are both great cars.