The only issues I see with those are that the xo frequency is rather high (3kHz), so there will be a bit of a dip in the off axis response, and they only have a couple of dB of BSC. If they are placed near-wall, or on an actual bookshelf, these become non-issues.
At that price, I should just grab the kit and build me a pair. I only have 14 pairs of DIY speakers hanging around the house.