Let someone else buy the car and take the $10-$15k depreciation hit. You will probably be able to find more than a few cars in the high $20k/low $30k range a year from now since this is their biggest year yet.
When I was seriously considering purchasing a new S281 convertible, I calculated the invoice price using Saleen's MSRP's posted on their website & the MSRP/invoice prices listed on Edmunds & KBB for Mustang GT's.
The Saleen premium over the GT is anywhere from $12K to $15K according to my calculations.
That sounds like a good idea. If I get any other Mustang –based car, it won’t be until 2007 anyway. There could be some nice ’06 S281s available by then.