Our Fusion3 F306 is just under $4K with the single extruder. Plenty fast, customers tell us great print quality, 12"x12"x12" print volume and very durable (we have printers with over 8500 hours without any meaningful failures).
Please feel free to visit our site http://www.fusion3design.com to learn more

(disclaimer: we're a little biased, that's our company)