48x24x48 VS 52x24x52 Lite-On?



Hi, i have choice of either of the drives (price the same). i want to use this as the main read drive. i dont do much ripping at all. noise is a factor,
id prefer to wait a few seconds longer if its going to be quieter.

does the 52x take longer to speed up or access?
is the 52x much noisier?
what should i go for the 48 or 52?

would a dvd drive have quicker access time? for data discs etc

thanks for any help!!