Let the hive mind of Engadget get that for you.
"I'm looking for a solid state drive, around 32 to 64GB, for use in my web server. The drive will contain my web sites and the operating system, either Windows Server 2008 R2 or Ubuntu. Large storage is handled by a separate RAID array, so capacity is not an issue. Rather, I am looking for the fastest, longest-lasting, and most reliable drive under $150 that is suitable to my application. Any thoughts? Thanks!"
HD-DVDs are faster and 30 GB is enough for a HD movie and extras. More disks could be used, they do it now with DVDs.
No one uses disks to record to anymore, just backing things up to keep, and this is where the speed helps.
I'm not even considering Blu-ray at all anymore.