I've been using KB 64Gb 1000X cards for the better part of the year without any problems. One of the things that Komputerbay advises on is to use a fully UDMA-7 CF card reader, using one that's not UDMA-7 might result in a corrupted CF card, and not all USB 3 CF card readers are UDMA-7 certified.
Now if money is no object, then by all means get yourself a few Lexar cards, but if your budget is tight, I still maintain that 2 or more KB cards are better than 1 Lexar. When it comes down to it, all CF cards can fail no matter the brand.
For all of the bitching about KB cards, there are an awful lot of silent but happy KB customers!