It is way more important to match by run time than voltage. Your pack is only as good as the lowest run time of any individual cell, once that cell is done you aren't going anywhere in a hurry.
Every pack I see which is well matched for voltage according to the label - isn't. Two weeks ago I cycled some cells from one of the best matchers, the labels said 1.191. Only 1 of the cells was that good, 2 of them were 1.15x. Don't believe the hype, from ANYBODY. The only way you can know for sure is to check them out yourself.
Chris.