The nsx2 prefix is just a sub-domain "mirror" of the main site that is typically used for beta-testing and is pretty standard practice. Usually admins do a better job of not letting the beta "leak" publicly though. Anyways it will still exist after the primary domain goes live and will serve as a load-handler (reduce the server load so we don't get another healthcare.gov incident). Having used www2's before I'm almost positive all requests submitted through nsx2 make it through.
www.nsx.acura.com and nsx2.acura.com are essentially the same site where currently the only difference between the two domains is that one url is designated the countdown timer for the unveiling...you guys basically discovered the backstage pass and got to meet the band before they show :tongue:
This makes sense. You're probably right about the two sites being used for load balancing.
Thinking about the options the only possible "must haves" are....
Paint upgrade
Power seats
Tech package
Michelin tires
Nearly all the others are extremely overpriced "dress up" options that only marginally improve the look of the car.