If the BM867 computer interface doesn't work straight away you can try windows virtualization via VMware Workstation or Virtualbox. It's being used currently for software which requires windows xp 32 bits, so you can run it on windows 8 64 bits, linux or mac.
Those wondering about the probes, I think is much better to have a set of them, one gold plated extreme quality for electronics work and another from rough stainless steel for high voltages where sparks can occur. Probably they should ship the two with the multimeter! You can add to it a second temperature probe and an amperimetric clamp for a more complete set.
I find the BM257 still big enough for carrying around. I think I would get a pocket multimeter instead of for general use (if there is any good). Not sure how much difference is between the 257 and a pocket multimeter (card or pen size). The Kyoritsu KEW1009 looks nice too.
The 869S is still a high pricey due to euro/dollar change, about 260€ VAT and shipment included to the EU. The shop
http://www.118volt.it sells it for a few euros less.
The last digit of the 869 is more to detect when a value starts to rise or decrease, than for accuracy purposes (for example monitoring the charge/discharge of a battery). Of course if you don't want to know that a mm with less counts will satisfy you.