Prizefight : Lenovo Thinkpad X300 vs MacBook Air Today, at last ThinkPad X300 after leaking to Best Buy and overviews and comparison with MacBook Air about it in many blogs and websites, officially unveiled. Its price starts at $2,799, and it is available through Lenovo's Web site and through retail stores. The First thing Lenovo has mentioned about its new ultra thin laptop is that ThinkPad X300 is more featured than MacBook Air although, it is a bit thicker (The laptop measures 0.73 inches at its thinnest point by 0.92 inches at its thickest point, while MacBook Air measures 0.16 inches at its thinnest part and 0.76 inches at its thickest part).