The RC150s were the best flats ever! I have two pairs left - both resoled now; both nearly dead.
In the UK we had the RC130s this last year or so - great shoes out of the box, but the life span is appalling. A step back from the 150s, but not as bad as the 152s (orange ones) which were less minimalist.
The NB Minimus range looks great - very excited about that!
NB have been the best brand for racing flats over the years - just having a weak patch that I hope will be ended by minimus!
In the meantime I have been running in Asics Piranhas - ran a marathon in them and have got almost 1500 miles out of them thus far (with one resole after 1000).