Till now I used my Aopen 1648 AAP (non-Pro) for all my ripping, cause it was the fastest among all my drives and never gave me a read-error.
Since my LG H22N can be speedpatched by MCSE I did a little test Aopen vs. LG
SingeLayer Estimated Time:
As you see, the Aopen was only 4 seconds faster than the LG, on DL it's 15 seconds.
If I would need another ripper, I would go for the LG as it's a burner and maybe a better reader, because it doesn't have the problems my Aopen has on burned media with high jitter, where my 1648 tends to have little speed dips.