Amazon offers the Micca MB42X Bookshelf Speakers for $89.99. Clip the 15% off coupon on the product page to drop the price to $76.49. (This price will show at checkout.) With free shipping, that's $14 off and the lowest price we could find. They feature silk dome tweeters, 4" woofers, and a 12dB crossover.

Also available are the Micca MB42 Bookshelf Speakers for $59.99. Clip the 15% off coupon on the product page to drop the price to $50.99. With free shipping, that's $9 off and the lowest price we could find. They also have silk dome tweeters and 4" woofers, but lack the crossover.