Just buy with the strap you want. 2 of the new models will come with the toe cap hybrid (GT and SE) and 2 will come with the traditional strap (RS and AT).
I realise that but how do I magically know which one I want? I already have the power strap so my logic is to go toe cap and then swap it back to the nxt-at power strap if I find I dont like the toe cap. If it will work hence my original question.