[H] Recs on External Hard Drives 3T USB 2.0/3.0?

[Veech]

I have a WD 500G external HD and am quickly filling it up with files.  I'm 
looking at expanding into 2T or even 3T range for an external drive.  I'm 
also considering one with USB 2.0/3.0 capability for when I eventually do 
the next PC upgrade.  I like WD drives but thought I would check in with you 
guys to see if you have any feedback or recs, or links to review pages, for 
these things.

thanks!