I have an SPF Mk11 and a CAV MK1 and both of those come very similiarly equipped. The RCR is a great kit and is the one I would get if I wanted to build the car, however after building 2 cobras including a Kirkham as well as 2 mustang fastbacks I was a little tired of the process. The SPF will require minimal work ( relative term) and will yield the most accurate to an original product available within a reasonable price range. The CAV is more like the RCR in that you end up with a super car that has taken many liberties in execution but still looks great and performs very well. I think if you follow the builds on the GT40 forum , the RCR cars turn out great,but do require a lot of work and end up costing more than you might think, but that is ok if you enjoy the process. I would not dream to try and convince anyone that one of these cars is better than another, just different, just as a Kirkham is different than an ERA or SPF. If originality is important to you then SPF is the way to go but it may cost a bit more.
