None of them.   If you are looking for a brand new timing GPS and don't like buying on eBay, I think the best deal is going to be The M12M because Synergy has offered to sell to people on these email lists at a discounted price of just below $60.  If you had to pay list price for a new production timing unit you'd pay 10X that much.    I don't mind buying older units on eBay but I can understand if sue one wanted technical support and a warranty and current 2012 state of the art, you don't get any of that on eBay.  

Here is a link Synergy M12M

You will have to talk directly to them about buying it and ask for the reduced price.    I have two of a 15 year old version of this.  I looks almost the same.  they have the same 10 pin male header except now they use 0.05 inch sping rather then 0.1