meh - S3 is not a good deal even if it was shipping today - but it won't even ship for 30 odd days from now...

My advice is to hold back and watch for now - if you must jump in then asicminer has the best deal at the moment with 8TH for approx $5000.

But even that will just about (maybe/might/unlikely) ROI (make your money back in BTC).

Buying BTC (as advised by others) is probably not a bad idea - but it's boring as hell and you might as well put your money in stocks and shares.