Better CD Drives?

[eq1986]

Might someone explain which is better, and why, and if either brand is good/bad/decent?

Also, they all have 8MB Caches, does this help in any way?

A451-2030 :: Artec / 8x4x12x DVD+RW / 4x2x12x DVD-RW / 24x10x40x CD-RW / Dual / DVD Burner

P67-1114 :: Plextor PX-716ASW / 4x16x DVD+RW DL / 16x8x16x DVD+RW / 16x4x16x DVD-RW / 48x24x48x CD-RW / DVD Burner

P67-1108 :: Plextor PX-712SA / 12x4x16x DVD+RW / 8x4x16x DVD-RW / 48x24x48x CD-RW / Roxio Software / White Box DVD Burner