Comparing the Typhoon to the F15 is comparing a 1970s product with what may yet be 2007 into service - why do it?
Of course the aircraft has good performance - fighters always needed it until we ordered our last bomber to do a fighters' job.
Stealthy it is not - that is a lamentable weakness in a modern product.
If the radar works at all it is a great technological leap for our procurement system.
The real crunch is cost - no sane man would spend so much when he could have got F16 off the shelf many years ago for a bargain price.
We've written a future for our forces of having to be dependent on the USA in any major action so why not have true inter-operability?