Which computer DVDrom is the best for ripping?

LaCie will probably do you well, although I haven't tried it. They are a bit pricey. For internal DVD burners currently in production, the only ones that are worth a spit are the "industrial" DVD burners from Teac.

There simply are no ROM drives that are usable for extraction. None of them are good enough.

The Plexwriter Premium is a very popular vintage CD burner with enthusiasts. They are considered the standard by which all others are measured. I have a Plexwriter Premium2, but AFAIK the only benefit is with the burning, which doesn't interest me. However, I wanted the absolute best, so I got it. Mankind will never make a drive like that again. They aren't cheap.

The correct way to evaluate a drive's response to low level instructions, and thus its ability to support secure ripping, is with Dbpoweramp and cachex (freeware) from cdfreaks.com.

Optiarc (Sony) and Plextor are no longer worth a spit and were once the premium consumer brands. Now they are just rebadged junk from China. Other than Teac, people seam to have the best luck with Lite-On drives amongst those currently in production. But Lite-On isn't anything special.

I haven't used EAC in a while, but dbPoweramp tests the drive more thoroughly than EAC did a couple of years ago. EAC asks the drive whether it has a read cache. dbPoweramp tries to test its size, which is where most modern disc drives fail. It doesn't do any good to have a read cache if you don't support the instructions to access it.

dbPoweramp also supports FUA, which is not supported strictly by Plextor, despite what dbPoweramp help says.