Epson America, Suddenly facing stiff competition in the Mac printer market, has announced two new ink-jet models (800/463-7766, http://www.epson.com ). The $279 Epson Stylus Color 860, which replaces the Stylus Color 850, produces text documents at up to 9.5 ppm and photos at up to 7 ppm. The Epson Stylus Color 760, $199 after a $30 rebate, prints black text at up to 7 ppm and color documents at up to 6 ppm. Both printers feature USB and parallel ports but no serial connections. Epson offers a $159 print server for both models that allows connection to Ethernet or AppleTalk networks.