eSATAp (eSATA/USB) is more economical & easier.

1) 50% of the notebooks out there have eSATAp

2) SATA is in all machine. Upgrading is just a ZERO driver USD 12 delock bracket. 99.9% compatibility as it makes use of onboard SATA.

3). NCIX, Crunchgear have proven that the more economical eSATAp is as fast if not faster than USB 3.0

4) eSATA is found in many NAS. (Note: you need port multiplier feature)

5) eSATAp is ALSO USB 2.0.

6) eSATAp can hotswap!. Can function as IDE mode.