ADS 710 speakers /Sound quality and specs?

I have a chance to purchase a pair of ADS 710 speakers, but I have not been able to find any reviews or specs on them. I would be using them to replace a pair of Polk Audio SDA 1 monitors.The Polks are too big for my room. Soundwise how would they differ from the Polks?Would a price of $250 be fair (probably 8 on audiogon scale and come with stands)?