Replacement laptop drives...whos best and what works?

I am thinking about replacing the drive that I am having trouble with in my laptop (in my other post) but I do not know which drives will work in it. The laptop is a Sony VGN-A690 with the DW-D56A burner in it.

I noticed on the big DW-D56A post that someone mentioned they replaced theirs with a NEC 6500A and liked it a lot better… Any experts know if there are other drives that will replace this also? Maybe something with Litescribe? Will the Panasonic UJ-870 work in this laptop as a replacement and if so is it any better then the Sony or NEC?

Thanks in advance.