A) Samsung Ml 1640 B) Samsung Ml 1915 Both are $79.99 price one is at futureshop other is at walmart. Both have 150mhz cpu, 8mb's or ram. I believe the 1640 has toner save while the 1915 doesn't. 1640 = 16 ppm, duty cycle of 5,000 pages. 1200x600 1915 = 19 ppm, duty cycle of 10,000 pages. 1200x600. Or the Samsung ML-2525W. $129.99 24ppm, 360mhz cpu, Wireless printing, 64mb of ram, 1200x1200, 12,000 page duty cycle .