ASUS has managed to crack the ultrabook pricing dilemma but doesn't expect itself or even the category to significantly challenge the MacBook Air, company CEO Jerry Shen said this weekend. The company would have five or six models like the UX21 ranging from $799 to a high $1,999. These would be high-end for ASUS, however, and would be an intentional relegation of ultrabooks to one fifth of its total notebook production.