WD Elements 1.5tb edition help

[ace123]

Hi, could anyone answer the following questions?

What is the rpm and cache size of the WD Elements 1.5tb edition?

Is it caviar green, black or blue?

Also, how reliable is it?

http://www.amazon.com/Western-Digital-Elements-External-WDBAAU0015HBK-NESN/dp/B002QEBMBY/ref=sr_1_1?s=electronics&ie=UTF8&qid=1294865994&sr=1-1

 

[Resteasy]

I don't know the specs but have had one of these for nearly a year to store video files and it's been great.
It's also cheaper at newegg until the 17th
http://www.newegg.com/Product/Product.aspx?Item=N82E16822136505&nm_mc=EMC-IGNEFL011111&cm_mmc=EMC-IGNEFL011111-_-EMC-011111-Index-_-ExternalHardDrives-_-22136505-L024C

 

[Emerald]

It seems to be a Caviar Green but it might only have a 16MB Buffer Memory

Specs found at http://www.shopmania.co.uk/shopping~online-hard-drives~buy-western-digital-wdbaah0015hch-eesn~p-7303158.html#pps
Western Digital hard drive, 1,536 GB storage capacity, 16 MB buffer memory, 7200 RPM rotational speed