congrats on the pickup, I am in the exact same position atm..
always wanted an IS and i am literally on carsales daily waiting for 'the right' one to come up, very tempted by the f sport as I just think all it needs is a few things (exhaust etc) and your pretty much done - has everything else I want.
but now that the new model is announced, should I hold out for a price drop or let temptation get in the way? the cheapest one ATM is $51k for a black f sport with 30k's.
alternatively could just get a base 350 and currently two are in the low 40's and 'spec it up' myself - not a huge fan of that idea but the savings may justify it.
currently have a black MY13 euro luxury and the idea of getting another black... scares me, lol.