I'm with Dan here, too much hype.
I've been running unmatched IB4200's for a year, the cells are still great. For this next year I will run them in 2wd (due to needing a funny layout) and get some new unmatched 4200's for 4wd.
I can not say that I have come away from a meeting this last year thinking "I'd have done better if I'd had better cells"
G