Suggestions please for good brand & place for great deal on external hard drive

I want a 2TB portable external hard drive with USB 3.0 or equivalent.

Any brands to avoid?

So far I haven't seen anything under $109 for my specifications..

I should be able to use the portable with my desktop until I transfer to a laptop, shouldn't I?

Home Edition
Version 2002
32-bit
Service Pack 3

Dell DIMENSION DIM2400
Intel(R)
Pentium(R) 4 CPU 2.66GHz
2.66 Ghz. 2.00 GB of RAM
Hard Drive Size 111.72 GB
Free Space 37.3 GB

planning to move soon to state of art processing power and at least 8GB RAM