I followed the link to the Egg for the large-capacity drive, and then to the WD manufacturer's spec from there.
They don't say anything about sustained throughput. Sustained throughput for first-gen SATA150 Raptors was about 72 MB/sec. Personally, I think this is a more important statistic than latency or access time.
I have a Seagate 7200.10 with sustained throughput of about 68 MB/sec, and those are the ones I chose for a 4-drive RAID5.
Put it another way. Find the benchmarks on the high-capacity drive and compare. Who has the money to spend on the Veloci-raptors? If you only seek parity with the dead-Raptor's performance, I think you may find it with other drives, and the cost-per-GB would probably be much lower.