Just curious, did you see the size chart? http://www.vibramfivefingers.com/size_fit/size_conversion_chart.htm
You should be M40 in KSO. I know because my foot is between 10 1/8 and 10 1/4" (at the end of the day) and the M40s fit fine lengthwise with basically no room to spare when wearing Injinjis.
My brother has M39 KSOs and they are basically the same width.
Black KSOs are known to be smaller in terms of the upper.
Your next pair is up to what you use them for. I'd say Bikilastreksports are more off-road/hiking while Bikila is for road use. For all around use I'd say Komodosports (they're like $10 more https://www.riversportsoutfitters.com/c-178-five-fingers.aspx
). If you have a high instep I'd say Bikila LS or Komodosport LS although the Komodosport LS supposedly has shorter laces. You could try ordering from an online retailer with a good return policy, if sizes are an issue.