OK, here's my penn'orth for anyone considering this option. It really depends on where you want to work for the majority of your career. For an EU national, an FAA license will only get you employment in the Far East and one or two other small (aviation-wise) areas, unless you have the right to live and work in the USA. As has been said above, the conversion from FAA to JAA ain't cheap and certainly won't save you any work.
You're probably better to plug on with the JAA stuff and, if you want to, get yourself an FAA license later - the conversion from JAA to FAA is much simpler and cheaper, especially when you have a few hours under your belt.
ATCN, we'll leave my imagination and your abuse out of this forum....